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因式分解 -(x+2)²+16(x-1)²
展开全部
-(x+2)²+16(x-1)²
=【4(x-1)-(x+2)】【4(x-1)+(x+2)】
=(3x-6)(5x-2)
=3(x-2)(5x-2)
=【4(x-1)-(x+2)】【4(x-1)+(x+2)】
=(3x-6)(5x-2)
=3(x-2)(5x-2)
追问
还有:(3x+2m)²-(x-2m)²
追答
:(3x+2m)²-(x-2m)²
=【(3x+2m)-(x-2m)】【(3x+2m)+(x-2m)】
=(2x+4m)(4x)
=8x(x+2m)
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