w2=2.8

Solution for w2=2.8 equation:

w2=2.8

We move all terms to the left:

w2-(2.8)=0

We add all the numbers together, and all the variables

w^2-2.8=0

a = 1; b = 0; c = -2.8;
Δ = b2-4ac
Δ = 02-4·1·(-2.8)
Δ = 11.2
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$w_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$w_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$w_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-\sqrt{11.2}}{2*1}=\frac{0-\sqrt{11.2}}{2}
=-\frac{\sqrt{}}{2}
$
$w_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{11.2}}{2*1}=\frac{0+\sqrt{11.2}}{2}
=\frac{\sqrt{}}{2}
$