问题 解答题

分解因式:

(1)x3-25x

(2)3ax2+6axy+3ay2

答案

(1)x3-25x,

=x(x2-25),

=x(x+5)(x-5);

(2)3ax2+6axy+3ay2

=3a(x2+2xy+y2),

=3a(x+y)2

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