SOLUTION: Use the quadratic formula to solve the equation. (x+4)(x-2)=5

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Question 961950: Use the quadratic formula to solve the equation.
(x+4)(x-2)=5
Answer by amarjeeth123(569)   (Show Source): You can put this solution on YOUR website!
(x+4)(x-2)=5
x^2+4x-2x-8=5
x^2+2x-13=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=56 is greater than zero. That means that there are two solutions: .




Quadratic expression can be factored:

Again, the answer is: 2.74165738677394, -4.74165738677394. Here's your graph:
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