a)(a - 3)(a² + 3a + 9) = a³ - 3³ = a³ - 27
b)(3p + 2c)(2p + 4c) = 6p² + 12cp + 4cp + 8c² = 6p² + 16cp + 8c²
a)(a - 3)(a² + 3a + 9) = a³ - 3³ = a³ - 27
b)(3p + 2c)(2p + 4c) = 6p² + 12cp + 4cp + 8c² = 6p² + 16cp + 8c²