m(m+16)=-48

Solution for m(m+16)=-48 equation:

m(m+16)=-48

We move all terms to the left:

m(m+16)-(-48)=0

We add all the numbers together, and all the variables

m(m+16)+48=0

We multiply parentheses

m^2+16m+48=0

a = 1; b = 16; c = +48;
Δ = b2-4ac
Δ = 162-4·1·48
Δ = 64
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$m_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$m_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{64}=8$
$m_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(16)-8}{2*1}=\frac{-24}{2}
=-12
$
$m_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(16)+8}{2*1}=\frac{-8}{2}
=-4
$