1、(完整版)多项式乘以多项式练习试题多项式与多项式相乘一、选择题1. 计算(2a3b)(2a3b)的正确结果是( )A4a29b2 B4a29b2 C4a212ab9b2 D4a212ab9b22。计算(ab)(a-b)其结果为( )Aa2b2 Ba2+b2 Ca2-2ab+b2 Da22abb23.下面计算中,正确的是( )A(m-1)(m2)=m2-3m-2 B(1-2a)(2+a)=2a2-3a+2C(x+y)(x-y)=x2-y2 D(x+y)(x+y)=x2+y24。若0x1,那么代数式(1x)(2x)的值是( )A一定为正B一定为负C一定为非负数D不能确定5.(x+a)(x3)的积的
2、一次项系数为零,则a的值是( )A1 B2 C3 D4二、填空题1. (3x1)(4x5)_2. (4xy)(5x2y)_3. 若a2a12,则(5a)(6a)_三、 计算题姓名_ 姓名_(1)(x8y)( xy) (2) (x1)(2x3) (3)(m2n)(3mn) (4)(x2)(x2) (5)(xy) (x2xyy2) (6)n(n1)(n2)(7) (8) (9) (10)(a+b+2)(a+b-2) (11) (12) (13)xy(x1)(x + 1) (14)(15)5(x1)(x+3)2(x5)(x2) (16)(17)(a+b+2)(a+b-2) (18) (19)(2x3)(2x + 3) (20)(21) (22)四.解方程:(2x+3)(x-4)(x+2)(x-3)=x2+6五.先化简,再求值:5x(x2+2x+1)-x(x-4)(5x-3),其中x=1 3 / 3