-16t^2+25t=0

Solution for -16t^2+25t=0 equation:

-16t^2+25t=0

a = -16; b = 25; c = 0;
Δ = b2-4ac
Δ = 252-4·(-16)·0
Δ = 625
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$t_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$t_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{625}=25$
$t_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(25)-25}{2*-16}=\frac{-50}{-32}
=1+9/16
$
$t_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(25)+25}{2*-16}=\frac{0}{-32}
=0
$