(x-6y)(x+2y)+16y^2 因式分解··老是看不出点什么.什么平法差,完全平方公式= = 就是看、变不出来
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(x-6y)(x+2y)+16y^2 因式分解··老是看不出点什么.什么平法差,完全平方公式= = 就是看、变不出来
(x-6y)(x+2y)+16y^2 因式分解
··老是看不出点什么.什么平法差,完全平方公式= = 就是看、变不出来
(x-6y)(x+2y)+16y^2 因式分解··老是看不出点什么.什么平法差,完全平方公式= = 就是看、变不出来
(x-6y)(x+2y)+16y^2
=x^2-4xy-12y^2+16y^2
=x^2-4xy+4y^2
=(x-2y)^2
你把式子(x-6y)(x+2y)展开 就等于
x^2-4xy+4y^2=(x-2y)^2
....楼主智商不是盖的
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