72*2y=y^2

Solution for 72*2y=y^2 equation:

72*2y=y^2

We move all terms to the left:

72*2y-(y^2)=0

determiningTheFunctionDomain
-y^2+72*2y=0

We add all the numbers together, and all the variables

-1y^2+72*2y=0

Wy multiply elements

-1y^2+144y=0

a = -1; b = 144; c = 0;
Δ = b2-4ac
Δ = 1442-4·(-1)·0
Δ = 20736
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{20736}=144$
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(144)-144}{2*-1}=\frac{-288}{-2}
=+144
$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(144)+144}{2*-1}=\frac{0}{-2}
=0
$