36a⁴ - 25 = (6a² - 5)(6a² + 5)216x³ - 1 = (6x - 1)(36x² + 6x + 1)100b² - 140bx² + 49x⁴ = (5b - 7x)(20b - 7x)(5b - 7x)125b³ + 27 = (5b + 3)((5b)² - 3(5b) + 3²) = (5b + 3)(25b² - 15b + 9)
(5a - 1/5)² = 25a² - 2a + 1/25(3a - 5b²)(9a² + 15ab² + 25b⁴) = 27a³ - 45a²b² + 45ab⁴ - 75a²b² - 125b⁴ + 75ab⁴ + 225a²b⁴ + 375b^6 = 27a³ - 120a²b² + 120ab⁴ + 225a²b⁴ + 375b^6
(0.8x + 5)(5 - 0.8x) = -4x + 25(7x + 0.4)² = 49x² + 5.6x + 0.16(6y + 1)(36y² - 6y + 1) = 216y³ - 36y² + 6y + 36y² - 6y + 1 = 216y³ + 1
25x² + 60xy + 36y² = (5x + 6y)²
36a⁴ - 25 = (6a² - 5)(6a² + 5)
216x³ - 1 = (6x - 1)(36x² + 6x + 1)
100b² - 140bx² + 49x⁴ = (5b - 7x)(20b - 7x)(5b - 7x)
125b³ + 27 = (5b + 3)((5b)² - 3(5b) + 3²) = (5b + 3)(25b² - 15b + 9)
(5a - 1/5)² = 25a² - 2a + 1/25
(3a - 5b²)(9a² + 15ab² + 25b⁴) = 27a³ - 45a²b² + 45ab⁴ - 75a²b² - 125b⁴ + 75ab⁴ + 225a²b⁴ + 375b^6 = 27a³ - 120a²b² + 120ab⁴ + 225a²b⁴ + 375b^6
(0.8x + 5)(5 - 0.8x) = -4x + 25
(7x + 0.4)² = 49x² + 5.6x + 0.16
(6y + 1)(36y² - 6y + 1) = 216y³ - 36y² + 6y + 36y² - 6y + 1 = 216y³ + 1
25x² + 60xy + 36y² = (5x + 6y)²