x² - 4 = 0x² = 4x = ±2
x² - 4x + 4 = 0(x - 2)² = 0x = 2
4x² - x = 0x(4x - 1) = 0x = 0, x = 1/4
x(x-1) - (x-5)² = 2x² - x - (x² - 10x + 25) = 2x² - x - x² + 10x - 25 = 29x - 25 = 29x = 27x = 3
Разложение на множители:а) 16u² - 25 = (4u + 5)(4u - 5)б) a² - 6ab + 9b² = (a - 3b)²в) 25u² - a² = (5u + a)(5u - a)г) c² + 4bc + 4b² = (c + 2b)²
x² - 4 = 0
x² = 4
x = ±2
x² - 4x + 4 = 0
(x - 2)² = 0
x = 2
4x² - x = 0
x(4x - 1) = 0
x = 0, x = 1/4
x(x-1) - (x-5)² = 2
x² - x - (x² - 10x + 25) = 2
x² - x - x² + 10x - 25 = 2
9x - 25 = 2
9x = 27
x = 3
Разложение на множители:
а) 16u² - 25 = (4u + 5)(4u - 5)
б) a² - 6ab + 9b² = (a - 3b)²
в) 25u² - a² = (5u + a)(5u - a)
г) c² + 4bc + 4b² = (c + 2b)²