math
posted by missfubuc .
simplify the expression
3(x2)9(x^2+7x+4)5(x+8)

first, get rid of the parens:
3(x2)9(x^2+7x+4)5(x+8)
3x  6  9x^2  63x  36  5x  40
Now collect like powers of x:
9x^2 + (3635)x + (63640)
9x^2  65x  82