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(1)(-b)3•(-b)2;(2)(-3x3)2-[(2x)2]3;(3)2(x+y2z+xy2z3)•xyz;(4)(5m-n)(-5m-n);(5)(25mn3-m2n2+16n4)÷23n2;(6)(x-y-z)(x-y+z).
题目详情
(1)(-b)3•(-b)2;
(2)(-3x3)2-[(2x)2]3;
(3)2(x+y2z+xy2z3)•xyz;
(4)(5m-n)(-5m-n);
(5)(
mn3-m2n2+
n4)÷
n2;
(6)(x-y-z)(x-y+z).
(2)(-3x3)2-[(2x)2]3;
(3)2(x+y2z+xy2z3)•xyz;
(4)(5m-n)(-5m-n);
(5)(
2 |
5 |
1 |
6 |
2 |
3 |
(6)(x-y-z)(x-y+z).
▼优质解答
答案和解析
(1)原式=-b3•b2=-b5;
(2)原式=9x6-64x6=-55x6;
(3)原式=2x2yz+2xy3z2+2x2y3z4;
(4)原式=n2-25m2;
(5)原式=
mn-
m2+
n2;
(6)原式=(x-y)2-z2=x2-2xy+y2-z2.
(2)原式=9x6-64x6=-55x6;
(3)原式=2x2yz+2xy3z2+2x2y3z4;
(4)原式=n2-25m2;
(5)原式=
3 |
5 |
3 |
2 |
1 |
4 |
(6)原式=(x-y)2-z2=x2-2xy+y2-z2.
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