16m² - 25n⁴ = (4m + 5n²)(4m - 5n²)
0,09a⁴ - 9b² = 0,09(a²)² - (3b)² = (0,3a² + 3b)(0,3a² - 3b)
(2a + 3)² - 4 = (2a + 3 + 2)(2a + 3 - 2) = (2a + 5)(2a + 1)
36 - (1 - 5x)² = 36 - (1 - 5x)(1 - 5x) = 36 - (1 - 10x + 25x²)= 36 - 1 + 10x - 25x² = 35 + 10x - 25x² = (5 + x)(7 - 5x)
16m² - 25n⁴ = (4m + 5n²)(4m - 5n²)
0,09a⁴ - 9b² = 0,09(a²)² - (3b)² = (0,3a² + 3b)(0,3a² - 3b)
(2a + 3)² - 4 = (2a + 3 + 2)(2a + 3 - 2) = (2a + 5)(2a + 1)
36 - (1 - 5x)² = 36 - (1 - 5x)(1 - 5x) = 36 - (1 - 10x + 25x²)
= 36 - 1 + 10x - 25x² = 35 + 10x - 25x² = (5 + x)(7 - 5x)