How do you multiply (7a^4+2a^2)(a-5)?

1 Answer
Barney V.
May 27, 2017

color(blue)(7a^5-35a^4+2a^3-10a^2

Explanation:

color(white)(aaaaaaaaaaaaa)7a^4+2a^2
color(white)(aaaaaaaaaaa) xx underline(a-5)
color(white)(aaaaaaaaaaaaa)7a^5+2a^3
color(white)(aaaaaaaaaaaaaaaaaaaaaa)-35a^4-10a^2
color(white)(aaaaaaaaaaaaa)overline(7a^5+2a^3-35a^4-10a^2)

arrange the terms in decreasing power:

color(blue)(7a^5-35a^4+2a^3-10a^2

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