20+m2=254

Solution for 20+m2=254 equation:

20+m2=254

We move all terms to the left:

20+m2-(254)=0

We add all the numbers together, and all the variables

m^2-234=0

a = 1; b = 0; c = -234;
Δ = b2-4ac
Δ = 02-4·1·(-234)
Δ = 936
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$m_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$m_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{936}=\sqrt{36*26}=\sqrt{36}*\sqrt{26}=6\sqrt{26}$
$m_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-6\sqrt{26}}{2*1}=\frac{0-6\sqrt{26}}{2}
=-\frac{6\sqrt{26}}{2}
=-3\sqrt{26}
$
$m_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+6\sqrt{26}}{2*1}=\frac{0+6\sqrt{26}}{2}
=\frac{6\sqrt{26}}{2}
=3\sqrt{26}
$