А) x²-y² = (x+y)(x-y)
Б) (a-3c)(a+3c) = a² - 9c²
В) 127² - 117² = (127 + 117)(127 - 117) = 244 * 10 = 2440
Г) a² - 100y² = (a + 10y)(a - 10y)
Д) (2-x)² = 4 - 4x + x²
Е) 25 - x² = (5 + x)(5 - x)
Ж) (2x+3)³ = (2x+3)(2x+3)(2x+3) = 8x³ + 27x² + 27x + 9
З) c² + 2c + 1 = (c+1)²
К) 4x² - y² = (2x+y)(2x-y)
Л) x² - 9y²/6 = (x+3y/√6)(x-3y/√6)
А) x²-y² = (x+y)(x-y)
Б) (a-3c)(a+3c) = a² - 9c²
В) 127² - 117² = (127 + 117)(127 - 117) = 244 * 10 = 2440
Г) a² - 100y² = (a + 10y)(a - 10y)
Д) (2-x)² = 4 - 4x + x²
Е) 25 - x² = (5 + x)(5 - x)
Ж) (2x+3)³ = (2x+3)(2x+3)(2x+3) = 8x³ + 27x² + 27x + 9
З) c² + 2c + 1 = (c+1)²
К) 4x² - y² = (2x+y)(2x-y)
Л) x² - 9y²/6 = (x+3y/√6)(x-3y/√6)