4a(a²+7a+4) A) 4a+28a² + 16a B) 4a³ +28a² + 16a C) 4a³ +44a D) 44a^4
1. Multiply 4a by each term inside the parentheses: 4a * a² = 4a³ 4a * 7a = 28a² 4a * 4 = 16a 2. Combine the like terms: 4a³ + 28a² + 16a Therefore, the correct answer is B) 4a³ + 28a² + 16a.
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