p*p/8=2.2

Solution for p*p/8=2.2 equation:

p*p/8=2.2

We move all terms to the left:

p*p/8-(2.2)=0

We add all the numbers together, and all the variables

p*p/8-2.2=0

We multiply all the terms by the denominator


p*p-(2.2)*8=0

We add all the numbers together, and all the variables

p*p-17.6=0

Wy multiply elements

p^2-17.6=0

a = 1; b = 0; c = -17.6;
Δ = b2-4ac
Δ = 02-4·1·(-17.6)
Δ = 70.4
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$p_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$p_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$p_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-\sqrt{70.4}}{2*1}=\frac{0-\sqrt{70.4}}{2}
=-\frac{\sqrt{}}{2}
$
$p_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{70.4}}{2*1}=\frac{0+\sqrt{70.4}}{2}
=\frac{\sqrt{}}{2}
$