分解因式：2ax2+4axy+2ay2=______．

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问题填空题

分解因式：2ax²+4axy+2ay²=______．

答案

2ax²+4axy+2ay²=2a（x²+2xy+y²）=2a（x+y）²．

故答案为：2a（x+y）²．

填空题

一个有理数的平方是它本身,则此有理数是( )

单项选择题

In the contract, usually there is a ________ clause to protect the buyer against loss from delay of the shipment of the goods.

A．payment
B．shipment
C．penalty
D．quality