①a的2方+ax-b的2方+bx②x的4方*y的4方-2x的2方*y的2方+1因式分解

问题描述:

①a的2方+ax-b的2方+bx②x的4方*y的4方-2x的2方*y的2方+1因式分解

a²+ax-b²+bx=a²-b²+ax+bx=(a-b)(a+b)+x(a+b)=(a+b)(a-b+x)x^4y^4-2x²y²+1=(x²y²)²-2(x²y²)+1=(x²y²-1)²=(xy+1)²(xy-1)²