Answer:
-6
Step-by-step explanation:
m^2 - 36 = 0
Add 36 to each side
m^2 -36+36 = 0+36
m^2 = 36
Take the square root of each side
sqrt( m^2) = ± sqrt(36)
m = ±6
We know one root is 6
The other root is -6
