已知根号(2x-y-4)+根号(x-2y-5)=0,求根号(y^2+5x)的值

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/18 22:53:33
已知根号(2x-y-4)+根号(x-2y-5)=0,求根号(y^2+5x)的值已知根号(2x-y-4)+根号(x-2y-5)=0,求根号(y^2+5x)的值已知根号(2x-y-4)+根号(x-2y-5

已知根号(2x-y-4)+根号(x-2y-5)=0,求根号(y^2+5x)的值
已知根号(2x-y-4)+根号(x-2y-5)=0,求根号(y^2+5x)的值

已知根号(2x-y-4)+根号(x-2y-5)=0,求根号(y^2+5x)的值
根号运算得到的结果必然是0或正数,因此要满足题中等式,则必须有
2x-y-4=0
x-2y-5=0
解得x=1 y=-2
故sqrt(y^2+5x) = sqrt(9) = 3

uuuy
ii

2x-y-4=0
x-2y-5=0
x=1
y=-2
y^2+5x=9

由√(2x-y-4)+√(x-2y-5)=0 2x-y-4=0 x-2y-5=0
解得 x=1 y=-2
所以√(y^2+5x)=3

已知x=2y,化简根号y/(根号x-根号y)-根号y/(根号x+根号y) 已知x=2y,化简根号y/(根号x-根号y)-根号y/(根号x+根号y) 已知x=2y,化简:根号y/根号x -根号y -根号y/根号x +根号y 已知x =2y 化简(根号y/根号x -根号y )-(根号y/根号x +根号y) 已知4x2+9y-4x-6y+2=0 求根号y/根号x+根号y - 根号y/根号x-根号y快. 已知4x2+9y-4x-6y+2=0 求根号y/根号x+根号y - 根号y/根号x-根号y急用. 已知实数x.y满足根号(x+y-8)+根号(8-x-y)=根号(3x-y-4)+根号(x-2y+7),求x,y 代数式求值.已知x=2,y=根号3,求 (根号x-根号y)/(根号x+根号y)+(根号x+根号y)/(根号x-根号y)已知x=2,y=根号3,求 (根号x-根号y)/(根号x+根号y)+(根号x+根号y)/(根号x-根号y) 已知根号4x-1+根号y+2=0,求根号x-y的值 已知y=根号(x-8)+根号(8-x)+18,求代数式[(x+y)/(根号x+根号y)]-2xy/(x根号y-y根号x)的值 已知y=根号1-x+根号x-1+3,求根号x+根号y分之x+2根号xy+y+根号x-根号y分之一的值 已知根号x=根号2-1/根号2,根号y=根号3-1/根号3,求代数式【(x+y)/(根号x-根号y)】-求代数式【(x+y)/(根号x-根号y)】-2xy/(x根号y-y根号x)已知根号x=根号2-(1/根号2),根号y=根号3-(1/根号3),求代数 4x-y/2根号x+根号y 9x-6根号xy+y/3根号x-根号y 已知x=2y,y=0,化简,根号y/(根号x-根号y)-根号y/(根号x+根号y) 已知y=根号x-2-3根号2-x+4,求x的y次方 已知根号x-3+根号3-x-4等于y求(x+y)^2的平方根 x+y/根号X-根号Y-2XY/X乘根号Y-Y乘根号X 根号x-根号y分之x+y-x根号y-y根号x分之2xy