八年级数学《整式乘除与因式分解》计算题
1.计算:
(1)(ab2)2·(-a3b)3÷(-5ab)
(3)a3•a2•a4+(﹣a)2 (4)(x2﹣2xy+x)÷x
2.分解因式:
(1)m2-6m+9 (2) (x+y)2+2(x+y)+1.
(3)m3n-9mn; (4)4x3y+4x2y2+xy3.
(5)3x-12x3; (6)9a2(x-y)+4b2(y-x);
3.先化简,再求值.
(1)2(x-3)(x+2)-(3+a)(3-a),其中,a=-2,x=1.
(2)若2x-y=10,求代数式[(x2+y2)-(x-y)2+2y(x-y)]÷4y的值.