0.089=u2

Solution for 0.089=u2 equation:

0.089=u2

We move all terms to the left:

0.089-(u2)=0

We add all the numbers together, and all the variables

-1u^2+0.089=0

a = -1; b = 0; c = +0.089;
Δ = b2-4ac
Δ = 02-4·(-1)·0.089
Δ = 0.356
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$u_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$u_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$u_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-\sqrt{0.356}}{2*-1}=\frac{0-\sqrt{0.356}}{-2}
=-\frac{\sqrt{}}{-2}
$
$u_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{0.356}}{2*-1}=\frac{0+\sqrt{0.356}}{-2}
=\frac{\sqrt{}}{-2}
$