Factor completely. If a polynomial cannot be factored, say it is prime.x9 - 1
A. (x2 + 1)(x6 - x3 - 1)
B. (x3 + 1)(x6 - x3 - 1)
C. (x2 - 1)(x6 + x3 + 1)
D. (x3 - 1)(x6 + x3 + 1)
Answer: D
Mathematics
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Given that the pair of triangles is similar, find the missing length. 
A. x = 6 B. x = 20 C. x = 18 D. x = 24
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Find the amplitude.y = 5 cos
A. 
B. 20
C. 5
D. 4
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Use the Half-angle Formulas to find the exact value of the trigonometric function. tan 75°
A. -2 + 
B. 2 + 
C. 2 - 
D. -2 - 
Mathematics
Perform the indicated operations and simplify the result. Leave the answer in factored form.
+ 
A. 
B. 
C. 
D. 
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