0=-16t^2+630

Solution for 0=-16t^2+630 equation:

0=-16t^2+630

We move all terms to the left:

0-(-16t^2+630)=0

We add all the numbers together, and all the variables

-(-16t^2+630)=0

We get rid of parentheses

16t^2-630=0

a = 16; b = 0; c = -630;
Δ = b2-4ac
Δ = 02-4·16·(-630)
Δ = 40320
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:

$\sqrt{\Delta}=\sqrt{40320}=\sqrt{576*70}=\sqrt{576}*\sqrt{70}=24\sqrt{70}$
$t_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-24\sqrt{70}}{2*16}=\frac{0-24\sqrt{70}}{32}
=-\frac{24\sqrt{70}}{32}
=-\frac{3\sqrt{70}}{4}
$
$t_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+24\sqrt{70}}{2*16}=\frac{0+24\sqrt{70}}{32}
=\frac{24\sqrt{70}}{32}
=\frac{3\sqrt{70}}{4}
$