Solve this equation

Question

x²-12=0

Answer 1

First add 12 on both sides of equation to isolate x².

 

x² = 12

 

 

Square-root both sides of equation to eliminate the exponent. 

 

x = ±√(12)

 

x = √(12)             and            x = -√(12)

 

x = √(4)√(3)         and            x = -√(4)√(3)

 

x = 2√3               and             x = -2√3