Factor.5c2 + 10cd + 5d2 - 125f2
A. 5(c + d + 5f)(c + d - 5f)
B. ((c + d)2 + 5f)((c + d)2 - 5f)
C. (c + d + 5f)(c + d - 5f)
D. 5((c + d)2 + 5f)((c + d)2 - 5f)
Answer: A
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directrix: x = 1.75
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focus: (-1.75, 2)
directrix: x = -2.25
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