问题
解答题
因式分
(1)24x2-28xy2
(2)6(x-2)+x(2-x)
(3)x5-x3
(4)a2b2-12ab+36.
答案
(1)原式=4x(6x-7y2);
(2)原式=6(x-2)-x(x-2)=(x-2)(6-x);
(3)原式=x3(x2-1)=x3(x+1)(x-1);
(4)原式=(ab)2-2•ab•6+62=(ab-6)2.
因式分
(1)24x2-28xy2
(2)6(x-2)+x(2-x)
(3)x5-x3
(4)a2b2-12ab+36.
(1)原式=4x(6x-7y2);
(2)原式=6(x-2)-x(x-2)=(x-2)(6-x);
(3)原式=x3(x2-1)=x3(x+1)(x-1);
(4)原式=(ab)2-2•ab•6+62=(ab-6)2.