9w*5*4w=36

Solution for 9w*5*4w=36 equation:

9w*5*4w=36

We move all terms to the left:

9w*5*4w-(36)=0

Wy multiply elements

180w^2*4-36=0

Wy multiply elements

720w^2-36=0

a = 720; b = 0; c = -36;
Δ = b2-4ac
Δ = 02-4·720·(-36)
Δ = 103680
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$w_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$w_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{103680}=\sqrt{20736*5}=\sqrt{20736}*\sqrt{5}=144\sqrt{5}$
$w_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-144\sqrt{5}}{2*720}=\frac{0-144\sqrt{5}}{1440}
=-\frac{144\sqrt{5}}{1440}
=-\frac{\sqrt{5}}{10}
$
$w_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+144\sqrt{5}}{2*720}=\frac{0+144\sqrt{5}}{1440}
=\frac{144\sqrt{5}}{1440}
=\frac{\sqrt{5}}{10}
$