Question

(6a-3b)(a+b)+(6a-3b)(a+2b)-(2b+b)(6a-3b)

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Answer 1

Explicación paso a paso:

=(6a²+6ab-3ba-3b²)+(6a²+12ab-3ba-6b²)-(12ba-6b²

+6ab-3b²)

=(6a²+3ab-3b²)+(6a²+9ab-6b²)-(18ab-9b²)

=12a²+12ab-9b²-18ab+9b²

=12a²-6ab