计算:(1)(-3a2b3)2(-a3b2)5;(2)?7x2y2?(?314x3y)?(?23xy4);(3)(-3ab)(2a2b+ab-1);(4
计算:(1)(-3a2b3)2(-a3b2)5;(2)?7x2y2?(?314x3y)?(?23xy4);(3)(-3ab)(2a2b+ab-1);(4)(6ab3+2a...
计算:(1)(-3a2b3)2(-a3b2)5;(2)?7x2y2?(?314x3y)?(?23xy4);(3)(-3ab)(2a2b+ab-1);(4)(6ab3+2ab2-3ab+1)(-2a2b);(5)(x+y)(x2-2x-3);(6)anb2[3bn-1-2abn+1+(-1)2003];(7)-(-x)2(-2x2y)3+2x2(xy4-1);(8)(3x-y)(y+3x)-(4x-3y)(4x+3y).
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(1)原式=9a4b6×(-a15b10)=-919b16;
(2)原式=-7×
×
×x2+3+1y2+1+4=-x6y7;
(3)原式=-6a2+1b2-3a2b2+3ab=-6a3b2-3a3b2+3ab;
(4)原式=-12a1+2b3+1-4a1+2b2+1+6a1+2b1+1-2a2b=-12a3b4-4a3b3+6a3b2-2a2b;
(5)原式=x3-2x2-3x+x2y-2xy-3y;
(6)原式=3anb2+n-1-2an+2b2+n+1-anb2=3anbn+1-2an+1bn+3-anb2;
(7)原式=8x2+6y3+2x2+1y4-2x2=8x8y3+2x3y4-2x2;
(8)原式=9x2-y2-16x2+9y2=-7x2+8y2.
(2)原式=-7×
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14 |
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(3)原式=-6a2+1b2-3a2b2+3ab=-6a3b2-3a3b2+3ab;
(4)原式=-12a1+2b3+1-4a1+2b2+1+6a1+2b1+1-2a2b=-12a3b4-4a3b3+6a3b2-2a2b;
(5)原式=x3-2x2-3x+x2y-2xy-3y;
(6)原式=3anb2+n-1-2an+2b2+n+1-anb2=3anbn+1-2an+1bn+3-anb2;
(7)原式=8x2+6y3+2x2+1y4-2x2=8x8y3+2x3y4-2x2;
(8)原式=9x2-y2-16x2+9y2=-7x2+8y2.
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