Answer:
D. 3x² + 12x
Explanation:
A. x² + 3x + 4
B. 3x² + 4
C. 3x3 + 12x
Product of 3x(x + 4)
Product means to multiply
Given:
3x(x + 4)
= (3x * x) + (3x * 4)
= 3x² + 12x
The correct answer is D. 3x² + 12x
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