а)
4x⁴ * (-2x²)³ = 4x⁴ * (-8x⁶) = -32x¹⁰
б)
(3x - 1)(3x + 1) - (3x + 1)² = 9x² - 1 + (9x² + 6x + 1) = 9x² - 1 + 9x² + 6x + 1 = 18x² + 6x
а) 25a - ab² = a(25 - b²) = a(5 - b)(5 + b)
б) 3a² - 6a + 3 = 3(a² - 2a + 1) = 3(a - 1)(a - 1) = 3(a - 1)²
а)
4x⁴ * (-2x²)³ = 4x⁴ * (-8x⁶) = -32x¹⁰
б)
(3x - 1)(3x + 1) - (3x + 1)² = 9x² - 1 + (9x² + 6x + 1) = 9x² - 1 + 9x² + 6x + 1 = 18x² + 6x
а) 25a - ab² = a(25 - b²) = a(5 - b)(5 + b)
б) 3a² - 6a + 3 = 3(a² - 2a + 1) = 3(a - 1)(a - 1) = 3(a - 1)²