ОДЗ
x > 6
log 3 (x + 2)(x - 6) = log 3 (9)
(x + 2)(x - 6) = 9
x^2 - 6x + 2x - 12 - 9 = 0
x^2 - 4x - 21 = 0
D = 16 + 4*21 = 100
x1 = (4 + 10)/2 = 14/2 = 7
x2 = (4 - 10)/2 = - 6/2 = - 3 (не удовлетворяет ОДЗ)
ОТВЕТ
7
3v7<4v5
3v7=v3^2x7=63
4v5=v4^2x5=80
3v7=63<4v5=80
16^6/(4^7*64) = 16^6/(4^7*4^3) = 4^12/4^10 = 4² = 16