百度作业网20(x+y)+25+4(x+y)^2
4(x+y)-20(x+y)+25
1) (2x+5y)(2x-5y)(-4x^2-25y^2) 2) [（x+y)(x-y)-(x-y)^2+2y(x-y
因式分解：4(x+y)^2+25-20(x+y)
20(x+y)+25+4(x+y)^2
4（x+y)^2+25-20(x+y)怎么解,
4（x+y)2+25-20（x+y) 因式分解
4（x+y）^2-20（x-y）+25
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20
4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6
x^2-y^2/x+y-4x(x-y)+y^2/2x-y,
(2x-y)^2-4(x-y)(x+2y)