x^2-y^2=55,x-y=5求x+y=
来源：学生作业帮助网 编辑：六六作业网 时间：2024/11/15 23:51:46
x^2-y^2=55,x-y=5求x+y=x^2-y^2=55,x-y=5求x+y=x^2-y^2=55,x-y=5求x+y=x^2-y^2=(x+y)(x-y)=5(x+y)=55则x+y=1111
x^2-y^2=55,x-y=5求x+y=
x^2-y^2=55,x-y=5求x+y=
x^2-y^2=55,x-y=5求x+y=
x^2-y^2
=(x+y)(x-y)
=5(x+y)
=55
则x+y=11
11
x=8
y=3
x + y = (x² - y²) / (x - y) = 55÷5 = 11
x²－y²=55
(x＋y)(x－y)=55
因为：x－y=5
则：5(x＋y)=55
x＋y=11
x^2-y^2=(x+y)(x-y)=55
因为x-y=5
于是x+y=(x+y)(x-y)/(x-y)=55/5=11
x+y=11
希望对你有所帮助~~~欢迎追问
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
求(X+Y)(X-Y)(X²+Y²),X=5 Y=2,
(x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5)
{(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=?
若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值
5x*2y=（x-y）^2 x+9y=55 求x、y
x^2-y^2=55,x-y=5求x+y=
已知x-y=3,求[（x+y)(x-y)-(x-y)^2+2y(x-y)]除以的值
已知3x =2y 求x/x+y+y/x-y-y²/x²-y²
y=2x*arctan(y/x),求y‘’
5X+Y=3 X+5Y=2 求x和y.5X+Y=3X+5Y=2求x和y.
x*x+y*y-2x+4y+5=0求x,
已知:3x-5y=0,求x/y,x-y/y,x-y/x
已知x+y=a,2x-y=-2a,求[（x/y-y/x)/(x+y)-x(1/x-1/y)]/[(x+1)/y]的值
若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值
x+2y=2x+y+1=7x-y 求：2x-y?
x^2+y^2=15,x+y=7,x＞y,求x-y