Factor completely.x4 + 2x2 - 80
A. (x2 - 8)(x2 - 10)
B. (x2 - 10)(x2 + 8)
C. (x2 - 10)(x2 + 1)
D. (x2 - 8)(x2 + 10)
Answer: D
Mathematics
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= 
for 90° < ? < 180°
A. 154.6° B. 151.8° C. 179.5° D. 2.1°
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Perform the indicated operation. Simplify if possible.
+ 
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Mathematics
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What will be an ideal response?
Mathematics