Ответы и объяснения

2012-10-11T16:49:21+04:00

3a - 3b - c(a - b) = 3(a + b) - c(a - b) = (a - b)(3 - c)

a⁴ - a³ - 4a + 4 = a³(a - 1) - 4(a - 1) = (a - 1)(a³ - 4))

25b² - (5 - b)² = (5b - 5 + b)(5b - 5 - b) = (6b - 5)(4b - 5)