-16x2+16x+480=0

Solution for -16x2+16x+480=0 equation:

-16x^2+16x+480=0

a = -16; b = 16; c = +480;
Δ = b2-4ac
Δ = 162-4·(-16)·480
Δ = 30976
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{30976}=176$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(16)-176}{2*-16}=\frac{-192}{-32}
=+6
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(16)+176}{2*-16}=\frac{160}{-32}
=-5
$