60k=12k^2

Solution for 60k=12k^2 equation:

60k=12k^2

We move all terms to the left:

60k-(12k^2)=0

determiningTheFunctionDomain
-12k^2+60k=0

a = -12; b = 60; c = 0;
Δ = b2-4ac
Δ = 602-4·(-12)·0
Δ = 3600
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$k_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$k_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{3600}=60$
$k_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(60)-60}{2*-12}=\frac{-120}{-24}
=+5
$
$k_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(60)+60}{2*-12}=\frac{0}{-24}
=0
$