SOLUTION: p^2-p=42 solving equations by factoring I know that p=7 I just can't figure out how to get there

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: p^2-p=42 solving equations by factoring I know that p=7 I just can't figure out how to get there      Log On


   

Question 737846: p^2-p=42
solving equations by factoring
I know that p=7
I just can't figure out how to get there
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
p%5E2-p=42
p%5E2-p-42=0

What integers have a product of -42 and a sum of -1?
Either {-6 and +7} OR {+6 and -7}.

Which of these is correct?
%28p-6%29%28p%2B7%29=p%5E2-p-42 OR %28p%2B6%29%28p-7%29=p%5E2-p-42
?