-(16t^2-18t-7)=10

Solution for -(16t^2-18t-7)=10 equation:

-(16t^2-18t-7)=10

We move all terms to the left:

-(16t^2-18t-7)-(10)=0

We get rid of parentheses

-16t^2+18t+7-10=0

We add all the numbers together, and all the variables

-16t^2+18t-3=0

a = -16; b = 18; c = -3;
Δ = b2-4ac
Δ = 182-4·(-16)·(-3)
Δ = 132
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:

$\sqrt{\Delta}=\sqrt{132}=\sqrt{4*33}=\sqrt{4}*\sqrt{33}=2\sqrt{33}$
$t_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(18)-2\sqrt{33}}{2*-16}=\frac{-18-2\sqrt{33}}{-32}
$
$t_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(18)+2\sqrt{33}}{2*-16}=\frac{-18+2\sqrt{33}}{-32}
$