若2^x=10,16^y=30求2^x-4y的值
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
若x^2+y^2-8x-10y+41=0,求x/y+y/x的值
已知:4x^2+y^2-4x-6y+10=0,求y/x-x/y的值
已知2x+y=10,求代数式((x+y)的平方-(x-y)的平方-2y(x-1/2y))/4y的值
若2x-y=0,求代数式[(x^2+y^2)-(x-y)^2+2y×(x-y)]÷4y的值
已知2x-y=10 求代数式[(x∧2+y∧2)-(x-y)∧2+2y(x-y)]÷4y的值
已知y-2x=10,求[2y(x-y)-(x-y)2+(x+y)2-2xy]÷4y的值.
如果2x-y=10,求代数式[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值
已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y的值
已知2x-y=10,求代数式[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值?
已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值
已知2x-y=10,求代数式[x²+y²-(x-y)²+2y(x-y)]÷4y的值