SOLUTION: How do you solve {{{x^2-9=y}}} by factoring? Please and thank you Solving a quadratic equation by factoring.

Algebra ->  Trigonometry-basics -> SOLUTION: How do you solve {{{x^2-9=y}}} by factoring? Please and thank you Solving a quadratic equation by factoring.       Log On


   

Question 970522: How do you solve x%5E2-9=y by factoring? Please and thank you
Solving a quadratic equation by factoring.

Found 2 solutions by jim_thompson5910, Alan3354:
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
If you want to factor x%5E2-9, then use the difference of squares rule to get

x%5E2-9+=+x%5E2+-+3%5E2+=+%28x-3%29%28x%2B3%29

So x%5E2-9 factors to %28x-3%29%28x%2B3%29

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
It is solved for y.
y+=+x%5E2+-+9