AM-122

Binomial expansion

A Math · Secondary 3 · Medium · Binomial expansion

Find, in ascending powers of

x

, the first four terms of the expansion of

(2-x)^5

.

$32-80x+80x^2-40x^3$
$32+80x+80x^2+40x^3$
$32-40x+80x^2-80x^3$
$32-80x+40x^2-80x^3$

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