SOLUTION: I have a problem. (xsquared - 3x + 5) (x + 9). What I have so far is 5x and 45. I'm not sure how to go about the others...

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: I have a problem. (xsquared - 3x + 5) (x + 9). What I have so far is 5x and 45. I'm not sure how to go about the others...      Log On


   

Question 182728This question is from textbook
: I have a problem. (xsquared - 3x + 5) (x + 9). What I have so far is 5x and 45. I'm not sure how to go about the others... This question is from textbook

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
%28x%5E2+-+3x+%2B+5%29%28x+%2B+9%29
x%5E3+-+3x%5E2+%2B+5x+%2B+9x%5E2+-+27x+%2B+45
x%5E3+-+3x%5E2+%2B+9x%5E2+%2B+5x+-+27x+%2B+45
x%5E3+%2B+6x%5E2+-+22x+%2B+45
---------------------------
I use a quick little check: suppose x+=+3 (or any number)
%28x%5E2+-+3x+%2B+5%29%28x+%2B+9%29
%289+-+9+%2B+5%29%2A12+=+60
and
x%5E3+%2B+6x%5E2+-+22x+%2B+45
27+%2B+54+-+66+%2B+45+=+60
OK