已知x=2009,y=2010,求：x²+2xy+y²/5x²-4xy ÷ x+y/5x-4y + x²-y/x 的值
来源：学生作业帮助网 编辑：六六作业网 时间：2024/11/17 02:46:08
已知x=2009,y=2010,求：x²+2xy+y²/5x²-4xy÷x+y/5x-4y+x²-y/x的值已知x=2009,y=2010,求：x²+
已知x=2009,y=2010,求：x²+2xy+y²/5x²-4xy ÷ x+y/5x-4y + x²-y/x 的值
已知x=2009,y=2010,求：
x²+2xy+y²/5x²-4xy ÷ x+y/5x-4y + x²-y/x 的值
已知x=2009,y=2010,求：x²+2xy+y²/5x²-4xy ÷ x+y/5x-4y + x²-y/x 的值
原式=[(x²+2xy+y²)/(5x²-4xy)]÷[(x+y)/(5x-4y)]+[(x²-y)/x]
={ (x+y)²/[x(5x-4y)] }×[(5x-4y)/(x+y)]+[(x²-y)/x]
=[(x+y)/x]+[(x²-y)/x]
=(x+y+x²-y)/x
=(x²+x)/x
=x(x+1)/x
=x+1
=2009+1
=2010
x²+2xy+y²/5x²-4xy ÷ x+y/5x-4y + x²-y/x
=(x+y)^2/x*(5x-4y)*(5x-4y)/(x+y)+(x^2-y)/x
=(x+y)/x+(x^2-y)/x
=(x+y+x^2-y)/x
=(x+x^2)/x
=1+x
=1+2009
=2010
已知:3x-5y=0,求x/y,x-y/y,x-y/x
已知x=3分之一,y=-2分之一,求代数式x-(x+y)+(x+2Y)-(x+3y)+(x+4y)...-(x+2009y)
已知：4x = 5y,求(x+y) ：y
已知y=x^y,求dy
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
已知（x-2009）²+y+2010的平方根=0,求x+y得立方根
已知|x|+x+y=10 |y|+x-y=12 求 x+y=?
已知|x|=2,|y|=3,|x+y|=-(x+y)求x-y
已知|x|+x+y=10,|y|+x-y=12,求x+y的值
已知|x|+x+y=10,x+|y|-y=12,求x、y的值
已知/x/+x+y=10,/y/+x-y=12.求x+y的值
已知x-y=8,（x+y)(x-y)=32,求x,y的值
已知|3x-y|+|x+y|=0,求x-y除以x*y的值.
已知x≠y,x^2-x=y^2-y,求x+y的值.
已知x=2009,y=2010,求分式x分之x-y除以括号x-x分之2xy-y括号的值
已知3x =2y 求x/x+y+y/x-y-y²/x²-y²
已知x-y=3,求[（x+y)(x-y)-(x-y)^2+2y(x-y)]除以的值
已知:x-2y=2009,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以8x 的值