因式分解:(1)(a+b)²+a+b+1/4 (2)6(x-y)²+3(y-x)³
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因式分解:(1)(a+b)²+a+b+1/4 (2)6(x-y)²+3(y-x)³
(a+b)²+a+b+1/4
=(a+b+1/2)的平方
(2)6(x-y)²+3(y-x)³
=3(x-y)²(2x-2y-x+y)
=2(x-y)(x-y)
=2(x-y)³
=(a+b+1/2)的平方
(2)6(x-y)²+3(y-x)³
=3(x-y)²(2x-2y-x+y)
=2(x-y)(x-y)
=2(x-y)³
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