2x-1/x=7

Simple and best practice solution for 2x-1/x=7 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 2x-1/x=7 equation: 


D( x )

x = 0

x = 0

x = 0

x in (-oo:0) U (0:+oo)

2*x-(1/x) = 7 // - 7

2*x-(1/x)-7 = 0

2*x-x^-1-7 = 0

2*x^1-1*x^-1-7*x^0 = 0

(2*x^2-7*x^1-1*x^0)/(x^1) = 0 // * x^2

x^1*(2*x^2-7*x^1-1*x^0) = 0

x^1

2*x^2-7*x-1 = 0

2*x^2-7*x-1 = 0

DELTA = (-7)^2-(-1*2*4)

DELTA = 57

DELTA > 0

x = (57^(1/2)+7)/(2*2) or x = (7-57^(1/2))/(2*2)

x = (57^(1/2)+7)/4 or x = (7-57^(1/2))/4

x in { (7-57^(1/2))/4, (57^(1/2)+7)/4} 

x in { (7-57^(1/2))/4, (57^(1/2)+7)/4 }

See similar equations:

| 12z-2z^2=36 | | (4x-6)+(7x+9)= | | 90+(x+13)+(x+23)=180 | | 35x+7=4x-9x | | -4n(n-4)-23=-7 | | 2-9=0 | | x^2+80x=900 | | 6(5x-9)+5=30x-49 | | 20=5(b+2) | | 4b-6-6b-7= | | 90-(6x+16)=6(x+8)+x | | 8+9t-7=9t+57-7t | | 3y+5=y+1 | | -4y+9(5y-4)=5+1(-7-y) | | =6x^2-24x+18 | | 16x+4=2x-9x | | 22+100=25x+70 | | X(8-4y)=7y-1 | | 64s^2-112s+49= | | 4d^3-d^3+2d^3= | | 40w+3(2w)=644 | | (3y-8)/12=(y/5) | | y+20=38 | | 13+4(a-5)=11-2a | | 3(x+3)=5x-11 | | t/2-5=7 | | -5.6b=61.6 | | 4e^3= | | 550x+200=100x-300 | | (8(x^2)-16x-504)=0 | | -4(n+1)-3=-19 | | 7x-27=10x-13 |

Equations solver categories