F(2)=-16(x)^2+50(x)+9

Solution for F(2)=-16(x)^2+50(x)+9 equation:

(2)=-16(F)^2+50(F)+9

We move all terms to the left:

(2)-(-16(F)^2+50(F)+9)=0

We get rid of parentheses

16F^2-50F-9+2=0

We add all the numbers together, and all the variables

16F^2-50F-7=0

a = 16; b = -50; c = -7;
Δ = b2-4ac
Δ = -502-4·16·(-7)
Δ = 2948
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$F_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$F_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{2948}=\sqrt{4*737}=\sqrt{4}*\sqrt{737}=2\sqrt{737}$
$F_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-50)-2\sqrt{737}}{2*16}=\frac{50-2\sqrt{737}}{32}
$
$F_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-50)+2\sqrt{737}}{2*16}=\frac{50+2\sqrt{737}}{32}
$