Question

. Expand the following.
(a +2b)²​

Answer 1

Step-by-step explanation:

$(a + 2b) {}^{2} \\ \\ a {}^{2} + 4b {}^{2} + 4ab$

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Answer 2

Answer:

(a +2b)²=a^2+(2b)^2+2[(a)(2b)]

=a^2+4b^2+2(2ab)

=a^2+4b^2+4ab

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