SOLUTION: Use the quadratic formula to solve (x+1)(x-2)=5

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Question 310129: Use the quadratic formula to solve
(x+1)(x-2)=5
Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
(x+1)(x-2)=5


Solved by pluggable solver: SOLVE quadratic equation (work shown, graph etc)
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=29 is greater than zero. That means that there are two solutions: .




Quadratic expression can be factored:

Again, the answer is: 3.19258240356725, -2.19258240356725. Here's your graph:
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