因式分解(4x+1)²-2(4x+1)(x-3)-3(x-3)²
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因式分解(4x+1)²-2(4x+1)(x-3)-3(x-3)²
(4x+1)²-2(4x+1)(x-3)-3(x-3)²
=[(4x+1)-3(x-3)][(4x+1)+(x-3)]
=(x+10)(5x-2)
因式分解(4x+1)²-2(4x+1)(x-3)-3(x-3)²
(4x+1)²-2(4x+1)(x-3)-3(x-3)²
=[(4x+1)-3(x-3)][(4x+1)+(x-3)]
=(x+10)(5x-2)