F(x)=4x2+16x-2

Solution for F(x)=4x2+16x-2 equation:

(F)=4F^2+16F-2

We move all terms to the left:

(F)-(4F^2+16F-2)=0

We get rid of parentheses

-4F^2+F-16F+2=0

We add all the numbers together, and all the variables

-4F^2-15F+2=0

a = -4; b = -15; c = +2;
Δ = b2-4ac
Δ = -152-4·(-4)·2
Δ = 257
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$F_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$F_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$F_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-15)-\sqrt{257}}{2*-4}=\frac{15-\sqrt{257}}{-8}
$
$F_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-15)+\sqrt{257}}{2*-4}=\frac{15+\sqrt{257}}{-8}
$