Question

( X + 3 ) ao quadrado = 4

Answer 1

( x + 3 )² = 4

x² + 6x + 9 - 4 = 0

x² + 6x + 5 = 0

x = - 3 + -√9 - 5

x = - 3 + - √4

x' = - 3 + 2 → x' = - 1

x" = - 3 - 2 → x" = - 5

S = ( - 1 ; - 5 )