Question

Multimea solutiilor ecuatiei √x²=3 este S ={..................}

Answer 1

dar,√x²=x
x=3⇒S=(3,-3)
Asa se rezolva aceasta probema

Answer 2

$\sqrt{x^2}=3 \\ |x|=3 \\ x = \pm 3 \\ S=\{\pm 3\}$