y2=195

Solution for y2=195 equation:

y2=195

We move all terms to the left:

y2-(195)=0

We add all the numbers together, and all the variables

y^2-195=0

a = 1; b = 0; c = -195;
Δ = b2-4ac
Δ = 02-4·1·(-195)
Δ = 780
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{780}=\sqrt{4*195}=\sqrt{4}*\sqrt{195}=2\sqrt{195}$
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-2\sqrt{195}}{2*1}=\frac{0-2\sqrt{195}}{2}
=-\frac{2\sqrt{195}}{2}
=-\sqrt{195}
$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+2\sqrt{195}}{2*1}=\frac{0+2\sqrt{195}}{2}
=\frac{2\sqrt{195}}{2}
=\sqrt{195}
$