F(x)=6x/x+2

Solution for F(x)=6x/x+2 equation:

(F)=6F/F+2

We move all terms to the left:

(F)-(6F/F+2)=0


Domain of the equation: F+2)!=0

F∈R


We get rid of parentheses

F-6F/F-2=0

We multiply all the terms by the denominator


F*F-6F-2*F=0

We add all the numbers together, and all the variables

-8F+F*F=0

Wy multiply elements

F^2-8F=0

a = 1; b = -8; c = 0;
Δ = b2-4ac
Δ = -82-4·1·0
Δ = 64
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$F_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$F_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{64}=8$
$F_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-8)-8}{2*1}=\frac{0}{2}
=0
$
$F_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-8)+8}{2*1}=\frac{16}{2}
=8
$