题目内容
因式分解
(1)ax2-16ay2;
(2)6xy2-9xy-y3.
(1)ax2-16ay2;
(2)6xy2-9xy-y3.
(1)ax2-16ay2
=a(x2-16y2)
=a(x+4y)(x-4y);
(2)6xy2-9xy-y3=-y(y2+9x-6xy).
=a(x2-16y2)
=a(x+4y)(x-4y);
(2)6xy2-9xy-y3=-y(y2+9x-6xy).
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