Question

Solve:

x^2 = 81

x^2 = -9

x^2 = 20

3x^2 = 125

Answer 1

x^2 = 81
x = ±√81
x = ±9

x^2 = -9 no solutions

x^2 = 20
x = ±√20
x = ±2√5


`3x^2 = 125 \\ x^2 = (125)/(3) \\ x=б \sqrt{ (125)/(3) }`