Multiply.9x4(5x3 + 8x2 + 8)
A. 45x3 + 72x2 + 72
B. 45x7 + 72x6 + 72x4
C. 45x7 + 8x2 + 8
D. 45x7 + 72x6
Answer: B
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A70 ftB
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- 3
- 
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B. 2x
C. 3x
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