Question

Resolva a equação log 5 (x2 - x) = log 5 12

Answer 1

log 5 (x2 - x) = log 5 12

(x² -x) = 12

x² -x -12 = 0

∆= 1 +48=49 => √∆=7

x' = -b+√∆/2a = 1+7/2 = 4 ✓

x" = -b-√∆/2a = 1-7/2 = -3 ✓