You can put this solution on YOUR website! (x+7)(x^2+5x-9)
first distribute the x to all the numbers in the second polynomial
x^3+5x^2-9x
then add to that what you get when you distribute the 7 in the second polynomial
x^3+5x^2-9x+7x^2+35x-63
next put them in decreasing degree order
x^3+5x^2+7x^2+35x-9x-63
finally combine the like terms to simplify and finish the problem
x^3+12x^2+26x-63
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