4x ^ 2 – 5x – 12 = 0: The Answer to a Quadratic Equation

Here, we’re going to take a look at the thrilling quadratic equation 4x 2 – 5x – 12 = 0 and parent out a way to resolve it. Quadratic equations are a totally critical part of the mathematics curriculum in each faculty and university these days.

Many humans may think that Quadratic has no realistic uses, but this isn’t proper. Everything has its own crucial makes use of in lots of different fields of study which can be more focused on studies and improvement.

Equation for a Quadratic

The quadratic equation is one of the maximum critical things to recognise about math. This class is one of the maximum primary ideas in algebra, and if you don’t study it, you might omit out on a very crucial part of gaining knowledge of approximately a very essential a part of maths. In this piece, we’re going to look more intently at what a quadratic equation is and the way to clear up it. Below, you’ll find a complete clarification of how to clear up 4×2 – 5x – 12 = 0.

Factoring the Quadratic Equation

One common approach to remedy quadratic equations is by using factoring. However, now not all quadratic equations are easily factorable. In this situation, we’re going to start through seeking to factor the equation 4x^2 – 5x – 12 = zero:

  • (4x + 3)(x – 4) = 0

We located two expressions, (4x + three) and (x – four), that multiply together to identical 0. Now we can use the 0-product assets, which states that if the product of two elements is zero, then at least one of the factors must be zero.

So, we set each issue equal to zero:

  • 4x + 3 = 0
  • x – 4= 0

Now, remedy for ‘x’ in each equation:

  • 4x + 3 = 0
  • 4x = -3
  • x = -3/4
  • x – 4 = 0
  • x = 4

We have determined answers for ‘x’: x = -3/4 and x = four. These are the roots of the quadratic equation 4x^2 – 5x – 12 = 0.

Using the Quadratic Formula

Another method to resolve quadratic equations is by the use of the quadratic system:

x = (-b ± √(b^2 – 4ac)) / (2a)

For our equation, a = 4, b = -5, and c = -12:

  • x = (5 ± √((-5)^2 – 4* 4 * (-12))) / (2 * 4)
  • x = (5 ± √(25 + 192)) / 8
  • x = (5 ± √217) / 8

Now, we’ve two viable answers:

  • x = (5 + √217) / 8
  • x = (5 – √217) / 8

These are the same solutions we found in advance the usage of the factoring method: x = -3/four and x = four.

The Idea Behind a Quadratic Equation

A quadratic equation is a polynomial equation of the second diploma, because of this that at the least one of the phrases within the equation is squared. The quadratic equation commonly looks something like this: x2 + bx + c = 0

wherein x is the variable and a, b, and c are constants. We need to parent out an equation as we study this piece after which set it away. The problem we are supposed to solve, which is,

The equation is: 4×2–5x–12 = 0.

With the help of quadratic equation strategies, this hassle is easy to solve. There are two methods to parent out the way to resolve this equation: the instantly technique and the Sridhar Acharya method. But because this math is quite easy, it is pleasant to simply use the immediately approach.

The solution to 4x 2 – 5x – 12 = 0 is:

If you plan to use the immediately technique, you will get two exclusive numbers for x. There can also be two solutions for x. Here’s a step-by means of-step plan for how to without difficulty remedy this problem. Read directly to discover greater:

The first thing to do could be to rewrite the equation. Just write the answer down in your pocket book out of your query paper or ebook.

Then, write your equation in this shape:

  • 4x^2-(2+3)x-12=0

Once this is accomplished, split the center a part of the equation and write it like this:

  • 4x^2-2x-3x-12=0

After locating what both parts have in commonplace, write your equation like this:

  • 2x(2x-1)-3(x-4)=0

But you’ll see that the numbers you get when you pass this a long way aren’t good, so this equation doesn’t work.

Still, there’s every other manner to discern out this sum, and it is referred to as the Sridhar Acharya method. In that way, you’ll want to use a components: x = (-b (b2 – 4ac)) / 2a. Here, we need to replace x, a, and c with the proper numbers from the equation and then positioned them right here in those equations. As long as you keep doing the maths, you’ll finally discover the right numbers.

  • X = (-b * log(b2 – 4ac)) 2a: If a=4, b=5, and c=12, then x=(-5(52–4x4x12))/2×4
  • When we resolve the equation above, we get x = 217 + five/eight or x = – 217 + 5/8.
  • After figuring out the price of the root, we get Axis of Symmetry (dashed) = x = 0.Sixty two.
  • Point of intersection at x,y = 0.Sixty two,-thirteen.Fifty six
  • Roots (Intercepts):
  • Root 1 at x = -1.22 and y = 0.00
  • Root 2 at x = 2.Forty seven and y = 0.00

So, you can resolve the e-mail and discern out what the numbers for x are.

How Quadratic Equation Is Used

Quadratic equations won’t appear to be they have got a good deal use inside the current global, however this equation and its methods are very crucial for many different things. Here is a list of conditions in which quadratic equations are very beneficial:

  • In the place of physics, as an instance, quadratic equations are used to do complicated maths. Quadratic equations are used to discern out how projectiles pass and for different vital physics problems.
  • In engineering, quadratic equations are often used to remedy issues. These equations can be used for coping with signals, analysing structures, or making electrical circuits.
  • It may sound bizarre, however quadratic equations are used inside the have a look at of finance, in particular whilst modelling complex financial structures or operating out tax funding returns.


The quadratic equation 4x^2 – 5x – 12 = zero can be solved the use of numerous strategies, inclusive of factoring and the quadratic formulation. The answers, x = -three/four and x = 4, constitute the values of ‘x’ that make the equation genuine. Understanding a way to clear up quadratic equations isn’t only a foundational mathematical ability but additionally an important tool in numerous fields and actual-world situations.

Frequently Asked Questions (FAQs) about “4x^2 – 5x – 12 = zero: The Answer to a Quadratic Equation”

What is a quadratic equation?

A quadratic equation is a polynomial equation of the second diploma, because of this it consists of a variable raised to the electricity of two (x^2). The general form is ax^2 + bx + c = 0, in which ‘a,’ ‘b,’ and ‘c’ are constants, and ‘x’ is the variable.

How do I identify a quadratic equation?

You can identify a quadratic equation by means of its maximum electricity of the variable, which is x^2. The equation 4x^2 – 5x – 12 = zero is a quadratic equation because it has x^2 as its maximum electricity.

What is the significance of solving quadratic equations?

Solving quadratic equations is vital in mathematics and has real-global applications in fields like physics, engineering, economics, and pc technological know-how. These equations regularly describe parabolic curves, which model various phenomena.

How do I resolve the quadratic equation 4x^2 – 5x – 12 = 0?

There are multiple strategies to clear up quadratic equations, consisting of factoring, finishing the square, and the usage of the quadratic formula. In the article, we mentioned both factoring and the usage of the quadratic components to discover the answers, which are x = -3/4 and x = 4.

What is factoring inside the context of quadratic equations?

Factoring is a technique used to rewrite a quadratic equation as the made of linear expressions. In our equation, (4x + 3)(x – four) = 0, is the result of factoring 4x^2 – 5x – 12 = 0.