3 years ago

(а^2+2)(а-1)-а(а^2+2) Help me, please.

1 answer:

4 0

Expand?

$(a^2+2)(a-1)-a(a^2+2) \\ \\ a^3 - a^2 + 2a - 2 - a^3 - 2a \\ \\ (a^3 - a^3) - a^2 + (2a - 2a) - 2 \\ \\ -a^2 - 2 \\ \\$

Answer: -a^2 - 2

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