a) x² + 2xy + y² - 16 = (x + y)² - 4² = (x + y - 4)(x + y + 4)
b) 8x² - 24x + 18 = 2(4x² - 12x + 9) = 2(2x - 3)² = 2(2x - 3)(2x - 3)
c) -64a³ + 1= 1 - 64a³ = 1³ - (4a)³ = (1 - 4a)(1 + 4a + 16a²)
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a) x² + 2xy + y² - 16 = (x + y)² - 4² = (x + y - 4)(x + y + 4)
b) 8x² - 24x + 18 = 2(4x² - 12x + 9) = 2(2x - 3)² = 2(2x - 3)(2x - 3)
c) -64a³ + 1= 1 - 64a³ = 1³ - (4a)³ = (1 - 4a)(1 + 4a + 16a²)