x为何值时,代数式(2x+9)/(x+3)-(1/x-3)-(2/x)的值等于2?

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x为何值时,代数式(2x+9)/(x+3)-(1/x-3)-(2/x)的值等于2?x为何值时,代数式(2x+9)/(x+3)-(1/x-3)-(2/x)的值等于2?x为何值时,代数式(2x+9)/(x

x为何值时,代数式(2x+9)/(x+3)-(1/x-3)-(2/x)的值等于2?
x为何值时,代数式(2x+9)/(x+3)-(1/x-3)-(2/x)的值等于2?

x为何值时,代数式(2x+9)/(x+3)-(1/x-3)-(2/x)的值等于2?
(2x+9)/(x+3)-(1/x-3)-(2/x)=2
(2x+9)/(x+3)-1/x+3-2/x=2
(2x+9)/(x+3)-1/x-2/x=2-3
(2x+9)/(x+3)-3/x=-1
x(2x+9)-3(x+3)=-x(x+3)
2x²+9x-3x-9=-x²-3x
2x²+x²+9x-3x+3x-9=0
3x²+9x-9=0
x²+3x=3
x²+3x+(3/2)²=3+9/4
(x+3/2)²=21/4
x+3/2=±√21/2
x=-3/2±√21/2

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