Question

log3(x mais 3) mais log3(2x -9) igual a 8

Answer 1

Olá Denim

log3(x + 3) + log3(2x - 9) = 8

log3(x + 3) + log3(2x - 9) = log3(3^8) 

log3(x + 3) + log3(2x - 9) = log3(6561)

(x + 3)*(2x - 9) = 6561

2x² - 3x - 27 = 6561 

2x² - 3x - 6588 = 0

delta 
d² = 9 + 8*6588 = 52713
d = 3√5857

x = (3 + 3√5857)/4