1-2xy2+x2y4=1-2xy2+(xy2)2=(1-xy2)2
=(-1+xy2)2.
故选A.
下列各式中,运算结果为1-2xy2+x2y4的是( ) A.(-1+xy2)2 B.(-1-xy2)2 C.(-1+x2y2)2 D.(-1-x2y2)2
下列各式中,运算结果为1-2xy2+x2y4的是( )
A. (-1+xy2)2
B. (-1-xy2)2
C. (-1+x2y2)2
D. (-1-x2y2)2
A. (-1+xy2)2
B. (-1-xy2)2
C. (-1+x2y2)2
D. (-1-x2y2)2
数学人气:355 ℃时间:2020-05-13 21:36:52
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