M1+m2=180

Solution for M1+m2=180 equation:

1+M2=180

We move all terms to the left:

1+M2-(180)=0

We add all the numbers together, and all the variables

M^2-179=0

a = 1; b = 0; c = -179;
Δ = b2-4ac
Δ = 02-4·1·(-179)
Δ = 716
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:

$\sqrt{\Delta}=\sqrt{716}=\sqrt{4*179}=\sqrt{4}*\sqrt{179}=2\sqrt{179}$
$M_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-2\sqrt{179}}{2*1}=\frac{0-2\sqrt{179}}{2}
=-\frac{2\sqrt{179}}{2}
=-\sqrt{179}
$
$M_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+2\sqrt{179}}{2*1}=\frac{0+2\sqrt{179}}{2}
=\frac{2\sqrt{179}}{2}
=\sqrt{179}
$