计算5y²-(y-2)-2(y-1)(y-5)
利用因式分解计算1/2x(x-y)^2-1/5y(x-y)
计算4(x+y)^5(x-y)^4÷[2(x+y)³*(y-x)²]
解方程3y^2-(2y+1)(y-2)=(y-5)(y-1)
解方程:3y^2-(2y+1)(y-1)=(y-5)(y+1)
代数式4y² - 2y + 5 = 7,那么代数式2y² - y + 1
计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)
解方程y-[3y-1]等于5【y+2]
1) (2x+5y)(2x-5y)(-4x^2-25y^2) 2) [(x+y)(x-y)-(x-y)^2+2y(x-y
计算:(x+2y)(3x-5y)-(6x的四次方y²-2x²y²)÷(2x²y&
利用乘除法运算公式计算5(x+y)(x-y)-2(x+y)^2+3(x-y)^2其中x=2,y=1
C语言中这个式子x=(y*5,y=y+6,y/z,y+=2+(z-=1));到底是怎么计算的?
已知x²+y²+5=2x+4y,求【2x²-(x-y)(x-y)】【(x+y-1)(x-y