Question

x elevado a 2/4 - 9=0​

Answer 1

${x}^{ \frac{2}{4} } - 9 = 0$

${x}^{ \frac{1}{2} } - 9 = 0$

${x}^{ \frac{1}{2} } = 9$

$( { {x}^{ \frac{1}{2} } )}^{2} = {9}^{2}$

$x = 81$

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x² / 4 - 9 = 0

Multiplique tudo por 4

x² - 36 = 0

x² = 36

x = √36

x = ±6

x¹ = -6

x² = 6