1、数学运算专题测试班级_ 姓名_ 分数_1计算:(1) ( -x-y) (2) (a+b)(-b-a) (3) ( a+b)( a-b) (4) (a+b)(-2 31b+a)(5) (m+2)(m-2)-m(m-3) (6) (m+1) -(1-m)(1+m) (7) (x+2y-3)(x-2y+3)2(8) (a + b 2c)2 (9) x2(4x) 2 (10) (-a+2bc)(a+2b+c)(11) (m+3n)2(m3n)2 (12) (m2n)(m2+4n2)(m+2n) (13) (3x2y) 24(2xy)(xy).(14) ( 2a+3b)22( 2a+3b)(a2b)+(
2、a+2b)2 (15) (2xy)(2xy )(2xy)(y 4x)2y(y 3x) 2、用简便方法计算:(1)30 29 (2)9993122(3)2016 2-20152017 (4) (3+ 1)(32+1)(34+1)(38+1)(316+1)3.先化简,再求值:(x- 2y)(x+2y)-(2x-y)2+(x+2y)2,其中,x=-1,y=-2.4.解方程 2(x-1) +(x-2)(x+2)=3x(x-5) 5.解不等式:(x- 8)2-(x-5)(x+5)-31.6.已知(a+b) 2=25,(a-b)2=9,求 ab 与 a2+b2 的值 . 7.已知 x2-4x+1=0,x0 求:(1) x 2+ ;(2) .