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To multiply \( (3x + 6)(x + 5) \), we can use the distributive property, also known as the FOIL method for binomials. This means we will multiply each term in the first binomial by each term in the second binomial. First, we multiply \( 3x \) by each term in \( (x + 5) \): 1. \( 3x \cdot x = 3x^2 \) 2. \( 3x \cdot 5 = 15x \) Next, we multiply \( 6 \) by each term in \( (x + 5) \): 1. \( 6 \cdot x = 6x \) 2. \( 6 \cdot 5 = 30 \) Now, we combine all these results: \[ 3x^2 + 15x + 6x + 30 \] Combine the like terms (\(15x + 6x\)): \[ 3x^2 + 21x + 30 \] So, the final answer is: \[ 3x^2 + 21x + 30 \]