4题因式分解
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4题因式分解
8.=0.6²-0.2²
=(0.6-0.2)(0.6+0.2)
=0.32
10.=(b²-a²)(x-y)
=(b-a)(b+a)(x-y)
7.=2xy(4x²-y²)
=2xy(2x-y)(2x+y)
9.=2(x²+4x+4)
=2(x+2)²
4题因式分解
8.=0.6²-0.2²
=(0.6-0.2)(0.6+0.2)
=0.32
10.=(b²-a²)(x-y)
=(b-a)(b+a)(x-y)
7.=2xy(4x²-y²)
=2xy(2x-y)(2x+y)
9.=2(x²+4x+4)
=2(x+2)²