题目内容
计算:
(1)(-2x2y)2•(-3xy).
(2)(-
a2b)•(
ac2).
(3)<“m“:math dsi:zoomscale=150 dsi:_mathzoomed=1>(-12x2y)3•3xy2•(2xy2)2(-
x2y)3•3xy2•(2xy2)2.
(4)-6m2n•(x-y)3•
mn2(y-x)2.
(1)(-2x2y)2•(-3xy).
(2)(-
| 2 |
| 3 |
| 5 |
| 6 |
(3)<“m“:math dsi:zoomscale=150 dsi:_mathzoomed=1>(-12x2y)3•3xy2•(2xy2)2(-
| 1 |
| 2 |
(4)-6m2n•(x-y)3•
| 1 |
| 3 |
(1)(-2x2y)2•(-3xy)
=4x4y2×(-3xy)
=-12x5y3;
(2)(-
a2b)•(
ac2)
=-
×
a3bc2
=-
3bc2;
(3)(-
x2y)3•3xy2•(2xy2)2
=-
x6y3×3xy2×4x2y4
=-
x9y9;
(4)-6m2n•(x-y)3•
mn2(y-x)2
=-6×
m3n3(x-y)5
=-2m3n3(x-y)5.
=4x4y2×(-3xy)
=-12x5y3;
(2)(-
| 2 |
| 3 |
| 5 |
| 6 |
=-
| 2 |
| 3 |
| 5 |
| 6 |
=-
| 5 |
| 9 |
(3)(-
| 1 |
| 2 |
=-
| 1 |
| 8 |
=-
| 3 |
| 2 |
(4)-6m2n•(x-y)3•
| 1 |
| 3 |
=-6×
| 1 |
| 3 |
=-2m3n3(x-y)5.
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