64y*y-625=0

Solution for 64y*y-625=0 equation:

64y*y-625=0

Wy multiply elements

64y^2-625=0

a = 64; b = 0; c = -625;
Δ = b2-4ac
Δ = 02-4·64·(-625)
Δ = 160000
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{160000}=400$
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-400}{2*64}=\frac{-400}{128}
=-3+1/8
$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+400}{2*64}=\frac{400}{128}
=3+1/8
$