原式=(x^4-2x³+x²)+(5x³-10x²+5x)+(7x²-14x+7)
=x²(x²-2x+1)+5x(x²-2x+1)+7(x²-2x+1)
=(x²-2x+1)(x²+5x+7)
=(x-1)²(x²+5x+7)
猜你喜欢
- 1已知：如图,在三角形ABC中,AD是角平分线.求证：S三角形ABD：S三角形ADC=AB：AC
- 2填空填介词：1.They like swimming()the sea.2.I wrote a lettr () my friend in Australia.
- 37倍根号3减去根号3分之1怎样化简
- 4谁能帮我看看下面4个例句分别是主语从句,宾语从句,表语从句和同位于从句的哪种?
- 5桂林山水甲天下作者
- 6在同一平面直角坐标系中,函数－1/x与函数y=x的图象交点个数是几个?
- 7There is a new swimming pool_______"Swan Lake Swimming Centre".横线上填什么
- 8用学过的句子,还要有趣.
- 9If 引导的条件状语从句后面接一般现在时,如果主句用said,是否要改?
- 10We have to get to school on time.(改为同义句) We have to ____ _____ _____ for school.