Question

log ( 65 - x3) = 3 log ( 5 - x )

Answer 1

Explicación paso a paso:

log( 65 - x³) = log(5 - x)³

65 - x³ = -x³ + 15x² - 75x + 125

-15ײ+75x-60 = 0 (-15)

x² - 5x + 4 = 0

(x - 4)(x - 1) = 0

x - 4 = 0 ; x - 1 = 0

x = 4 x = 1