【题目】分解因式:ax4﹣9ay2=_____


参考答案:

【答案】a(x2+3y)(x2﹣3y)

【解析】原式=a(x4﹣9y2)=a(x2+3y)(x2﹣3y),

故答案为:a(x2+3y)(x2﹣3y).

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