Find the least common denominator (LCD).
, 
A. 6x2 + 36
B. 6x(x + 6)
C. 6x2 + 6
D. 6x + 6
Answer: B
Mathematics
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A.
B.
C.
D.
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Solve the equation by completing the square.a2 - 4a - 21 = 0
A. , -
B. -18, -3
C. 7, -3
D. -7, 3
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