SOLUTION: I can't figure this problem out. I got -4077 and the book said it was -45 i don't know what I'm doing wrong please help!! (: P(y)=8y3-12y-5 Find P(-2) and P(1/3) ps the thr

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: I can't figure this problem out. I got -4077 and the book said it was -45 i don't know what I'm doing wrong please help!! (: P(y)=8y3-12y-5 Find P(-2) and P(1/3) ps the thr      Log On


   

Question 800410: I can't figure this problem out. I got -4077 and the book said it was -45
i don't know what I'm doing wrong please help!! (:
P(y)=8y3-12y-5
Find P(-2) and P(1/3)
ps the three is 3 cubed
thank you
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
P(y)=8y3-12y-5
P(-2) = 8*(-2)^3-12*(-2)-5
=8*-8+24-5
=-45

Find P(-2) and P(1/3)
P(y)=8y3-12y-5
=8(1/3)^3 -12(1/3)-5
=8/27 -4-5
=8/27 -9
=-235/27