因式分解 (1)ax2-16ay2; (2)6xy2-9xy-y3.
问题描述:
因式分解
(1)ax2-16ay2;
(2)6xy2-9xy-y3.
答
(1)ax2-16ay2
=a(x2-16y2)
=a(x+4y)(x-4y);
(2)6xy2-9xy-y3=-y(y2+9x-6xy).