Question

log(x—5)+log(x+4)=1 por favor ayuden en resolviendo

Answer 1

log (x - 5) + log (x + 4) = log (10)
x-5 >0 ......x>5
x+4>0........x>-4
intersectando x >5

log((x-5)(x+4)) = log(10)

(x-5)(x+4) = 10

x^2 - x -20 = 10

x^2 - x -30 = 0
x_____-6
x_____5

(x-6) (x+5) = 0
x =6