SOLUTION: FIND THE ZEROS x^2+2x-63=y x^2-x-72=y

Question 40907: FIND THE ZEROS
x^2+2x-63=y
x^2-x-72=y
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
x^2+2x-63=y

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=256 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 7, -9. Here's your graph:

-----------------------------------
x^2-x-72=y

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=289 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 9, -8. Here's your graph:

Hope this helps.
Cheers,
Stan H.

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