Объяснение:
1.
5^(2x + 1) = 5²
2x + 1 = 2
2x = 1
x = 1/2
2.
(4/5)^(x² - 14x) = (4/5)^(-45)
x² - 14x = -45
x² - 14x + 45 = 0
x₁ = 5, x₂ = 9, так как 5·9 = 45, 5 + 9 = -(-14)
