Multiply.(3x - 8y)(5x + 5y + 1)
A. 15x2 - 40xy + 3x - 40y2 - 8y
B. 15x2 - 25xy - 25y2
C. 15x2 - 25xy + 3x - 40y2 - 8y
D. 15x2 + 15xy + 3x - 40y2
Answer: C
Mathematics
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