a) 121a^2 - 81b^2 = (11a + 9b)(11a - 9b)
б) 16x^2 + 49y^2 - 56xy = (4x - 7y)(4x - 7y)
в) 125x^3 + 27y^3 = (5x + 3y)(25x^2 - 15xy + 9y^2)
г) a^3 - 3a^2x + 3ax^2 - x^3 = (a-x)^3
д) a^5 + 32b^5 = (a + 2b)(a^4 - 2a^3b + 4a^2b^2 - 8ab^3 + 16b^4)
a) 121a^2 - 81b^2 = (11a + 9b)(11a - 9b)
б) 16x^2 + 49y^2 - 56xy = (4x - 7y)(4x - 7y)
в) 125x^3 + 27y^3 = (5x + 3y)(25x^2 - 15xy + 9y^2)
г) a^3 - 3a^2x + 3ax^2 - x^3 = (a-x)^3
д) a^5 + 32b^5 = (a + 2b)(a^4 - 2a^3b + 4a^2b^2 - 8ab^3 + 16b^4)