SOLUTION: Use the quadratic formula to solve the equation. 3x^2-36x=72 The answer is going to be 18 + or - the square root of something over 3.

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Question 161241: Use the quadratic formula to solve the equation.
3x^2-36x=72
The answer is going to be 18 + or - the square root of something over 3.
Answer by KnightOwlTutor(293)   (Show Source): You can put this solution on YOUR website!
3x^2-36x=72
The first step is to subtract 72 from both sides
3x^2-36x-72=0


Solved by pluggable solver: SOLVE quadratic equation with variable
Quadratic equation (in our case ) has the following solutons:



For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

Discriminant d=2160 is greater than zero. That means that there are two solutions: .




Quadratic expression can be factored:

Again, the answer is: 13.7459666924148, -1.74596669241483. Here's your graph:
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