Question

(x-4)ao quadrado=81 Considerando que x e E R ,resolva as equações

Answer 1

${(x - 4) }^{2} = 81 < = > {x}^{2} - {4}^{2} = 81 < = > {x}^{2} - 16 = 81 < = > x = 81 + 16 < = > x = 97$
(x - 4) }^{2} = 81 < = > {x}^{2} - {4}^{2} = 81 < = > {x}^{2} - 16 = 81 < = > x = 81 + 16 < = > x = 97