AM-181

Binomial expansion

A Math · Secondary 3 · Easy · Binomial expansion

Expand

(1-3x)^4

in ascending powers of

x

up to the term in

x^3

.

$1-12x+54x^2-108x^3$
$1-12x+36x^2-108x^3$
$1-12x+54x^2+108x^3$
$1+12x+54x^2-108x^3$

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