Factor completely.5x2 - 15xy - 20y2
A. 5(x + y)(x - 4y)
B. (5x - 5y)(x + 4y)
C. 5(x - y)(x + 4y)
D. Prime
Answer: A
Mathematics
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A. G4
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C. G
D. 
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?
sec ? = -1.64 and 
.
?
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Mathematics