18h*15.75h=738

Solution for 18h*15.75h=738 equation:

18h*15.75h=738

We move all terms to the left:

18h*15.75h-(738)=0

Wy multiply elements

270h^2-738=0

a = 270; b = 0; c = -738;
Δ = b2-4ac
Δ = 02-4·270·(-738)
Δ = 797040
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$h_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$h_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{797040}=\sqrt{1296*615}=\sqrt{1296}*\sqrt{615}=36\sqrt{615}$
$h_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-36\sqrt{615}}{2*270}=\frac{0-36\sqrt{615}}{540}
=-\frac{36\sqrt{615}}{540}
=-\frac{\sqrt{615}}{15}
$
$h_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+36\sqrt{615}}{2*270}=\frac{0+36\sqrt{615}}{540}
=\frac{36\sqrt{615}}{540}
=\frac{\sqrt{615}}{15}
$