SOLUTION: Solve using the quadratic formula 5x2-5x-10=0 note: the first 5x is squared but I wasn't sure how to put that in with the keyboard

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Question 509094: Solve using the quadratic formula
5x2-5x-10=0
note: the first 5x is squared but I wasn't sure how to put that in with the keyboard
Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
Solve using the quadratic formula
5x2-5x-10=0
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Use the ^ (Shift 6) for exponents
5x^2-5x-10=0
Divide by 5
x^2-x-2=0
(x-2)*(x+1) = 0
x = -1, 2
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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=225 is greater than zero. That means that there are two solutions: .




Quadratic expression can be factored:

Again, the answer is: 2, -1. Here's your graph:
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