(5x-y)²+(-5x+y)(y+5x)-10x(x-y)
x(x-y)-y(y-x)+(x-y)²因式分解
因式分解 -5x³y(x-y)³+20y【x²(y-x)】²
(3x-y)²-2x(4x-5y)-(x+2y)²
(x+y)²+4(x+y)-5
2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
y=5;x=14;y=((x=3*y,x+6),x-1); printf(''x=%d,y=%d'
(2/3x-2/x+y(x+y/3x-x-y))÷x-y/x,其中5x+3y=0
已知:(x+2)²+|x+y-10|=0,求3x²y-[5x²y-﹙2xy-x²
2.(x+y)²(x-y)²-(x-y)(x+y)(x²+y²)
分式的加减:[(x/y-y/x)除以(x+y)+x(1/y-1/x)]除以1+x/y,其中x=5,y=2
合并多项式:5(x-y)²-(x-y)-8(x-y)²-3(x-y)
计算4(x+y)^5(x-y)^4÷[2(x+y)³*(y-x)²]