<span>а) 6-5х=8-2х,
-5х+2х=8-6,
-3х=2,
x=-2/3
б) 8у+11=у-3</span>,
8y-y=-11-3,
7y=-14,
y=-2
(2b - 1)² - (b + 2)² = 4b² - 4b + 1 - (b² + 4b + 4) = 4b² - 4b + 1 - b² - 4b - 4 = 3b² - 8b - 3
D = 64 + 36 = 100 = 10²
x₁ = 8 - 10 / 6 = -1/3
x₂ = 8 + 10 / 6 = 3
3(x + 1/3)(x - 3)
Пожалуйста. ...................