(3a + 4)² = 9a² + 24a + 16
(2x - b)² = 4x² - 4xb + b²
(b + 3)(b - 3) = b² - 9
(5y - 2x)(5y + 2x) = 25y² - 4x²
(c + b)(c - b) - (5c² - b²) = c² - b² - 5c² + b² = -4c²
25y² - a² = (5y - a)(5y + a)
c² + 4bc + 4b² = (c + 2b)²
12 - (4 - x)² = x(3 - x)
12 - (16 - 8x + x²) = 3x - x²
12 - 16 + 8x - x² = 3x - x²
-4 + 8x = 3x
5x = 4
x = 0,8
Ответ: x = 0,8
(3x + y²)(3x - y²) = 9x² - y⁴
(a³ - 6a)² = a⁶ - 12a⁴ + 36a²
(a - x)²(x + a)² = (a² - x²)² = a⁴ - 2a²x² + x⁴
100a⁴ - 1/9 b² = (10a² - 1/3 b)(10a² + 1/3 b)
9x² - (x - 1)² = (3x - (x - 1))(3x + (x - 1)) = (2x + 1)(4x - 1)
x³ + y⁶ = (x + y²)(x² - xy² + y⁴)