SOLUTION: I can't figure this out {{{2x^2-16x-18=0}}} I tried factoring by trinomials but I wind up getting 18, -1, but I checked the back of the book and it says 9, -2. Please Hel

Algebra ->  Algebra  -> Quadratic Equations and Parabolas  -> Quadratic Equation Customizable Word Problems -> SOLUTION: I can't figure this out {{{2x^2-16x-18=0}}} I tried factoring by trinomials but I wind up getting 18, -1, but I checked the back of the book and it says 9, -2. Please Hel      Log On

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Question 6458: I can't figure this out
2x%5E2-16x-18=0
I tried factoring by trinomials but I wind up getting 18, -1, but I checked the back of the book and it says 9, -2.
Please Help.
Answer by minerva(22) About Me  (Show Source):
You can put this solution on YOUR website!
2x^2-16x-18=0
2(x^2 -8x-9)=0
x^2-9x+x-9=0
x(x-9)+1(x-9)=0
(x+1)(x-9)=0
x=-1,x=+9
i hope i was of help!!!