已知10^x=4,10^y=5,求10^2x-3y
已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y
已知x+y=4,x^2+y^2=10,求(x-y)^2
已知x^2-4x+y^2-10y+29=0,求x^2y^2+2x^3y^2+x^4y^2的值
已知X^2-4X+Y^2-10Y+29=0,求X^2Y^2+2X^3Y^2+X^4Y^2
已知x^2-4x+29-10y+y^2=0,求x^2y^2+2x^3y^2+x^4y^2
已知x=y+3,求代数式4分之一(x-y)的平方-0.3(x-y)+0.75(x-y)的平方+10分之3(x-y)-2(
已知x=y+3,求代数式:l/4(x-y)的平方 -0.3(x-y)+0.75(x-y)的平方+3/10(x-y)-2(
已知:4x^2+y^2-4x-6y+10=0,求y/x-x/y的值
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
已知4x^2+y^2-4x-6y+10=0,求(2\3x根号9x+y^2根号x/y^3)-(x^2-5x根号y\x) 拜
已知2x-y=10,求式子[(x^2+y^2)-(x-y)^2+2y(x-y)]/4y (4xy-2y²)/4
已知/x/+x+y=10,/y/+x-y=12.求x+y的值