Question

log2 + log(11-x2) = 2log(5-x)
nose como se resuelve me podeis ayudar porfa ayundeme

Answer 1

log(22-2x2)-log(25-10x+x2)=0
log(22-2x2/25-10x+x2)=0
10°=22-2x2/25-10x+x2
1=22-2x2/25-10x+x2
25-10x+x2=22-2x2
3x2-10x+3=0
(x-3)(3x-1)=0
CS=(3,1/3)