Question

determine o conjunto soluçao de: x ao quadrado-169=0

Answer 1

x² - 169 = 0
x² = +169
x = + ou - $\sqrt{169}$
x' = +13
x'' = -13

Answer 2

x² - 169 = 0

x² = 169
x = ±√169
x = ±√13²
x = ± 13

x' = 13

x'' = -13

S ={13,  -13}