Factor using the ac-method.9x4 + 12x2 + 4
A. (9x2 + 2)(x2 + 2)
B. (3x2 - 2)(3x2 - 2)
C. (3x2 + 1)(3x2 + 4)
D. (3x2 + 2)(3x2 + 2)
Answer: D
Mathematics
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B. f-1(x) = 
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Fill in the blank(s) with the appropriate word(s).
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A. 22 B. 16 C. -16 D. -22
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