问题
解答题
计算: (1)(-2x2y)2•(-3xy). (2)(-
(3)<“m“:math dsi:zoomscale=150 dsi:_mathzoomed=1>(-12x2y)3•3xy2•(2xy2)2(-
(4)-6m2n•(x-y)3•
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答案
(1)(-2x2y)2•(-3xy)
=4x4y2×(-3xy)
=-12x5y3;
(2)(-
a2b)•(2 3
ac2)5 6
=-
×2 3
a3bc25 6
=-
3bc2;5 9
(3)(-
x2y)3•3xy2•(2xy2)21 2
=-
x6y3×3xy2×4x2y41 8
=-
x9y9;3 2
(4)-6m2n•(x-y)3•
mn2(y-x)21 3
=-6×
m3n3(x-y)51 3
=-2m3n3(x-y)5.