F(x)=3x-4x^2

Solution for F(x)=3x-4x^2 equation:

(F)=3F-4F^2

We move all terms to the left:

(F)-(3F-4F^2)=0

We get rid of parentheses

4F^2-3F+F=0

We add all the numbers together, and all the variables

4F^2-2F=0

a = 4; b = -2; c = 0;
Δ = b2-4ac
Δ = -22-4·4·0
Δ = 4
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$F_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$F_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{4}=2$
$F_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-2)-2}{2*4}=\frac{0}{8}
=0
$
$F_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-2)+2}{2*4}=\frac{4}{8}
=1/2
$