How do you multiply $(a+2b-4ab)(2a-b)$ ?

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Answer 1 · 2018-04-28T06:42:48

$(a+2b−4ab)(2a−b)$

By Binomial Multiplication:

$= 2a(a+2b−4ab)-b (a+2b−4ab)$

$=2a^2+4ab-8a^2b-ab-2b^2+4ab^2$

$=2a^2+4ab-ab-8a^2b-2b^2+4ab^2$

$=2a^2+3ab-8a^2b-2b^2+4ab^2$

How do you multiply (a+2b-4ab)(2a-b)(a+2b-4ab)(2a-b)?