所属成套资源:2020年 人教版八年级数学上册期末专题练习(含答案)
2020年 人教版八年级数学上册期末专题《整式的乘法》计算题(含答案)
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期末专题《整式的乘法》计算题1.计算:a3·a5+(-a2)4-3a8 2.计算:(﹣2a2)2•a4﹣(5a4)2. 3.计算: 4.计算:(x4)3+(x3)4﹣2x4•x8 5.计算:[x(x2y2-xy)-y(x2-x3y)]÷x2y. 6. 计算:(ab2)2•(﹣a3b)3÷(﹣5ab); 7.计算:(x3)2÷x2÷x+x3•(﹣x)2•(﹣x2) 8.化简:x(4x+3y)-(2x+y)(2x-y) 9.化简:3a(2a2-9a+3)-4a(2a-1) 10.化简:(a+2b)(3a﹣b)﹣(2a﹣b)(a+6b) 11.化简:4(a+2)(a+1)-7(a+3)(a-3) 12.化简:-5x(-x2+2x+1)-(2x+3)(5-x2) 13.计算:(2x﹣7y)(3x+4y﹣1) 14.化简:2a(a-b)-(2a+b)(2a-b)+(a+b)2. 15.化简:(3a+2b﹣1)(3a﹣2b+1) 16.(2x+3y)2-(4x-9y)(4x+9y)+(3x-2y)2. 17.化简:(a﹣2b)2﹣(2a+b)(b﹣2a)﹣4a(a-b) 18. 化简:(3x﹣2y+1)(3x﹣2y﹣1) 19.化简:(2x﹣y)(4x2﹣y2)(2x+y) 20.化简:(3x+2)(3x-2)﹣5x(x-1)﹣(2x-1)2.
参考答案1.原式=-a8;2.原式=﹣21a8.3.原式=10a6; 4.原式=0;5.解:原式=[x2y(xy-1)-x2y(1-xy)]÷x2y=2x2y(xy-1)÷x2y=2(xy-1)=2xy-2.6.原式=a10b6; 7.原式=x6÷x2÷x﹣x3•x2•x2=x6﹣2﹣1﹣x3+2+2=x3﹣x7. 8. 原式=3xy+y2;9.原式=6a3-35a2+13a10.原式=4x2+4x+1﹣y211.原式=-3a2+12a+7112.原式=7x3-7x2-15x-15.13.解:(2x﹣7y)(3x+4y﹣1)=6x2+8xy﹣2x﹣21xy﹣28y2+7y=6x2﹣13xy﹣2x+7y﹣28y2;14.原式=-a2+2b2.15.原式=9a2﹣4b2+4b﹣1.16.解:-3x2+94y2 17.原式=a2﹣4ab+4b2﹣b2+4a2﹣4a2+4ab=a2+3b2; 18.原式= (3x﹣2y+1)(3x﹣2y﹣1)=(3x﹣2y)2﹣12=9x2﹣12xy+4y2﹣1.19.原式=16x4﹣8x2y2+y4;20.原式=9x-5.