Question

Resolva equaçao do 2 Grau :
x²-49=0
3x²-27=0

Answer 1

X² = 49
X = (+-) √49
X = (+-) 7
s = {-7 ; +7}
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3X² = 27
  X² = 27/3
  X² = 9
  X = √9
  X = (+-) 3
s = {-3;+3}