How do you multiply (9x ^ { 3} - 8) ( x ^ { 9} - 3)?

1 Answer
Dec 3, 2017

=9x^12-8x^9-27x^3+24

Explanation:

Follow the FOIL rule (First, Outer, Inner, Last)
images.tutorvista.comimages.tutorvista.com

(9x^3-8)(x^9-3)

Note: When dealing with exponents, follow the exponent laws. image.mathcaptain.comimage.mathcaptain.com

(9x^3*x^9)+(9x^3*-3)+(-8*x^9)+(-8*-3)

Note: (negative) * (negative) = (positive)

(9x^(3+9))+(-27x^3)+(-8x^9)+(24)

9x^12-27x^3-8x^9+24

I'm just going to rearrange it in descending order of x

=9x^12-8x^9-27x^3+24