Hi Dr.Math,

Recently i have argument with my colleague for equations below

√[(-2)^2] = x

a) x = -2

b) x = 2

c) x = 2 or -2

just wondering which answer of that? a,b or c?

btw, if my equation assignment is

√[(-2)^2] = -2

Can they state my equation with Math Error?

thank you