0=-16t^2+64t-6

Solution for 0=-16t^2+64t-6 equation:

0=-16t^2+64t-6

We move all terms to the left:

0-(-16t^2+64t-6)=0

We add all the numbers together, and all the variables

-(-16t^2+64t-6)=0

We get rid of parentheses

16t^2-64t+6=0

a = 16; b = -64; c = +6;
Δ = b2-4ac
Δ = -642-4·16·6
Δ = 3712
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$t_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$t_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{3712}=\sqrt{64*58}=\sqrt{64}*\sqrt{58}=8\sqrt{58}$
$t_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-64)-8\sqrt{58}}{2*16}=\frac{64-8\sqrt{58}}{32}
$
$t_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-64)+8\sqrt{58}}{2*16}=\frac{64+8\sqrt{58}}{32}
$