Question

log de (x^2 -5) na base 1/2 =2

Answer 1

log ₁/₂ (x² - 5) = 2
x² - 5 = 1/2²
x² - 5 = 1/4
4.(x² - 5) = 1
4x² - 20 = 1
4x² = 1 + 20
4x² = 21
x² = 21/4
x = +/- √21/4