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歡迎您訪問數學考題練習:將多項式x2y-4y分解因式,其中結果正確的是!

數學考題練習:將多項式x2y-4y分解因式,其中結果正確的是

更新時間:2024-01-12 16:27:50作者:貝語網校

將多項式x2y-4y分解因式,其中結果正確的是

A.y(x+2)(x-2)

B.y(x+4)(x-4)

C.y(x2+2)(x2-2)

D.y(x-2)2

試題答案

A

試題解析

先提取公因式y,再利用平方差公式繼續進行因式分解即可.

解答:x2y-4y

=y(x2-4)

=y(x+2)(x-2).

故選A.

點評:本題考查了提公因式法,公式法分解因式,提取公因式后利用平方差公式進行二次分解,注意分解要徹底.

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