Question

Determinati numerele reale x , astfel incat $\sqrt{(x+5)²}$ = 11

Answer 1

x + 5 = ± 11
Avem ecuatiile:

a) x + 5 = 11 =>   x = 11 - 5  =>   x = 6

b) x + 5 = -11 =>  x = -11 - 5  =>   x = -16