Question

resolva as equacoes do 2 grau na variavel x:
h)x²/25-1/9=0

Answer 1

x²/25 - 1/9 = 0 

x²/25 = 1/9 

x²  = (1/9). 25

x² = 25/9 

x = √25/9 

x' = 5/3 

x'' = - 5/3                             S = { - 5/3 , 5/3 }                                   ok