14.1—14.2整式乘法运算题
一、直接写出答案。
(1)x2·x3 = (2)a·a6 = (3)- x5·x3·x10 =
(4)m x-2·m2-x = (5)10x×1000=
(6)(-2)×(-2)5×(-2)5 =
(7)(103)6 = (8)(a4)2 = (9)(a m)10=
(10)-(x4)5= (11)(a2)3·a5 = (12)-(-x2)2= (13)(2a)2 =
(14)(-5b)3= (15)(x2y)3=
(16)(-3m2)3= (17)(2ab2)3 =
(18)-(x2y3z5)2= (19)-8m2n3·3m4n5 = (20)3x2·(-6xy2)= (21)(-5a2b)(-4a)= (22)3x2·6x2= (23)4y·(-2xy2)= (24)(-3x)2·5x3= (25)x8 ÷x3=
(26)(ab)5÷(ab)2= (27)(-a)12÷(-a)5= (28)m8÷m2= (29)(xy)6÷(xy)3= (30)n7÷(-n5)= (31)-8a2b3 ÷ 6ab2= (32)(6×109)÷(2×105)=
(33)(4×103)×(5×105)=
(34)(_____-4b)(_____+4b)=9a2-16b2
(35)(_____-2x)(_____-2x)=4x2-25y2
二、计算(请写出过程)
1.a2·(-a)5·(-3a)3 2.[(a m)n]p 3.(-mn)2(-m2n)3
4.(-3ab)·(-a 2c)·6ab 2 5.(-ab)3·(-a 2b)·(-a 2b 4c)2
6. (-4a)·(2a 2+3a-1)
7. (-2ab 2)3·(3a 2b-2ab-4b 2)
8.(3m-n)(m-2n). 9.(x+2y)(5a+3b). 10.5x(x 2+2x+1)-(2x+3)(x-5)
11.-ab 2(3a 2b –abc-1) 12.)2()1015(23xy xy y x -÷- 13.(12x 2-10xy 2)÷4xy
14. 7m (4m 2p )2÷7m
2 15.)2
1()612375.0(234232y x y x y x y x -÷--
16.(2x +2)(2x -2) 17.(a+3b )(a-3b )
18. (-2x -5)(2x -5) 19.(-2x+3)2 20. 982
21.(3x-5)2 - (2x+3)2
22. (a -5) 2-(a +6)(a -6)
23. (2x -3y )(3y +2x )-(4y -3x )(3x +4y )
24. 3(2x +1)(2x -1)-2(3x +2)(2-3x )
25. (31x +y )(31x -y )(91x 2+y 2
)
26. )1)(1)(1)(1(42x x x x ++-+
27. 28.))(())(())((a c a c c b c b b a b a +-++-++-
29.22)2()2()2)(12(+---+-x x x x ,其中2
11-=x
30.(2x +3y )2-(2x +y )(2x -y ),其中x=1,y=2