825=-16t^2+1450

Solution for 825=-16t^2+1450 equation:

825=-16t^2+1450

We move all terms to the left:

825-(-16t^2+1450)=0

We get rid of parentheses

16t^2-1450+825=0

We add all the numbers together, and all the variables

16t^2-625=0

a = 16; b = 0; c = -625;
Δ = b2-4ac
Δ = 02-4·16·(-625)
Δ = 40000
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$t_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$t_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{40000}=200$
$t_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-200}{2*16}=\frac{-200}{32}
=-6+1/4
$
$t_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+200}{2*16}=\frac{200}{32}
=6+1/4
$