SOLUTION: Factoring Quadratic Expressions-- Directions; Factor each expression. Problem; -y^2+17y-72 So far I have this; -y^2+17y-72 -1(y^2+17y-72) I'm lost a

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Factoring Quadratic Expressions-- Directions; Factor each expression. Problem; -y^2+17y-72 So far I have this; -y^2+17y-72 -1(y^2+17y-72) I'm lost a      Log On


   



Question 565580: Factoring Quadratic Expressions--
Directions; Factor each expression.
Problem; -y^2+17y-72
So far I have this; -y^2+17y-72
-1(y^2+17y-72)
I'm lost after that. Please help me with the next steps.

Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
So far I have this; -y^2+17y-72
-1(y^2+17y-72)
When you factored out (-1), you forgot to also switch the signs for the second and third terms as follows:
-1(y^2-17y+72)
-1(y-9)(y-8)