分解因式:(a+b)²-4a²= (1/2 x+2/3 y-3/4 z)²-(1/2 x-2/3 y-3/4 z)²=

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分解因式:(a+b)²-4a²= (1/2 x+2/3 y-3/4 z)²-(1/2 x-2/3 y-3/4 z)²=
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分解因式:(a+b)²-4a²= (1/2 x+2/3 y-3/4 z)²-(1/2 x-2/3 y-3/4 z)²=
分解因式:(a+b)²-4a²= (1/2 x+2/3 y-3/4 z)²-(1/2 x-2/3 y-3/4 z)²=

分解因式:(a+b)²-4a²= (1/2 x+2/3 y-3/4 z)²-(1/2 x-2/3 y-3/4 z)²=
:(a+b)²-4a²
= [(a+b)+2a][﹙a+b)-2a]
=(a+b)²﹙a-b)²
(1/2 x+2/3 y-3/4 z)²-(1/2 x-2/3 y-3/4 z)²
=[﹙1/2 x+2/3 y-3/4 z)+(1/2 x-2/3 y-3/4 z)][﹙1/2 x+2/3 y-3/4 z)-(1/2 x-2/3 y-3/4 z﹚]
=4/3 y﹙ x-3/2 z﹚