分解因式(1)x2y2-x2-4y2+4xy(2)(a2+1)(a2+2)+14
分解因式(1)x2y2-x2-4y2+4xy(2)(a2+1)(a2+2)+14....
分解因式(1)x2y2-x2-4y2+4xy(2)(a2+1)(a2+2)+14.
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失恋33天qh
推荐于2016-06-18
·
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(1)x
2y
2-x
2-4y
2+4xy
=(xy)
2-(x-2y)
2=(xy+x-2y)(xy-x+2y)
(2)(a
2+1)(a
2+2)+
.
=a
4+3a
2+
=(a
2+
)
2
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