1.x平方-20xy-1500y平方
问题描述:
1.x平方-20xy-1500y平方
2.(x-y)²(x+y)+(x+y)²(y-x)
3.a四次方-2a²b²+b四次方
4.x²y²+x²+y²+1
5.(x+1)(x+3)-8
答
1.(x-50y)(x+30y)
2.(x+y)(x-y)(2x-1)
3.(a+b)²(a-b)²
4.(x²+1)(y²+1)
5.(x+5)(x-1)