Question

multimea solutiilor ecuatiei x la puterea a 2a =36

Answer 1

x^2=36 => x€{6;-6}...

Answer 2

x² = 36
x² = - 36
x = √-36
x = -6

x² = 36
x  = √36
x = 6

S = { 6 , -6 }