计算(1)a3-a3+(-2a3)2+(a2)3(2)(x-1)(x+2)+(-x+1)(x-3)
题型:解答题难度:一般来源:不详
计算 (1)a3-a3+(-2a3)2+(a2)3 (2)(x-1)(x+2)+(-x+1)(x-3) |
答案
(1)原式=a6+4a6+a6 =(1+4+1)a6 =6a6;
(2)原式=x2+2x-x-2-x2+3x+x-3 =5x-5. |
举一反三
计算:(a2)6÷a8+(-2a)2-(-a2). |
(1)xy2-(-4x3y) (2)a2-a4+(-a2)3 (3)(x-3y)(x-y) (4)(x+1)(x-1)-(x+2)2. |
先化简,再求值:(2x+6y)2-4x(x+2y)+(-9y)-4y,其中x=-,y=6. |
先化简,再求值(2a+b)(2a-b)+3(2a-b)2+(3a-b)(2a-b),其中a=-1,b=2. |
化简求值:[2x-(2y-1)][2x+(2y-1)]-(4y+x)(4x-y),其中x=2,y=-1. |
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