4(x+y)-20(x+y)+25

4(x+y)-20(x+y)+25 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)平方-20(x+y)+25 4（x+y)2+25-20（x+y) 因式分解 4（x+y）²-20（x+y）+25 4（x+y）^2-20（x-y）+25 因式分解：4(x+y)的平方+25-20(x+y) 1) (2x+5y)(2x-5y)(-4x^2-25y^2) 2) [（x+y)(x-y)-(x-y)^2+2y(x-y 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