Question

( x - 3 )² = 5x + 9
me ajudem é urgente !!

Answer 1

(x - 3)² = 5x + 9
x² - 2.3x + 9 = 5x + 9
x² - 6x + 9 = 5x + 9
x² - 6x = 5x
x² - 6x - 5x = 0
x² - 11x = 0
x(x - 11) = 0
x = 0
ou 
x - 11 = 0
x = 11

R.: x = 0 e x = 11

Answer 2

( x - 3 )² = 5x + 9
x^2 - 3x - 3x + 9 = 5x + 9
x^2 - 3x - 3x - 5x + 9 - 9 = 0
x^2 - 11x = 0
x ( x - 11 ) = 0

x = 0

x - 11 = 0
x = 11

S = { 0 ; 11 }