Log₂(x-5/4) = 0 2log₄(3x-7) = 3
x - 5/4 = 1 log₄(3x-7)²=3
x = 1 + 1,25 (3x-7)² = 4³
x = 2,25 9x² - 42x + 49 = 64
9x² - 42x - 15 = 0
Ответ: {2,25} 3x² - 14x - 5 = 0 D=b²-4ac= 196+60 = 256
x₁ = (-b+√D)/2a = (14+16)/6 = 5
x₂ = (-b-√D)/2a = (14-16)/6 = - 1/3
Ответ: {- 1/3; 5}