Factor the polynomial completely using the grouping method.16x2 + 16x - 21
A. (4x - 3)(x + 7)
B. (4x + 3)(4x - 7)
C. prime
D. (4x - 3)(4x + 7)
Answer: D
Mathematics
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A. 31.8 mi B. 15.0 mi C. 18.6 mi D. 48.3 mi
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Simplify the expression. Assume that all variables are positive when they appear.
? 
A. 9x B. -2x C. 20 D. 20x2
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Find all cube roots of the complex number. Leave answers in trigonometric form.-125i
A. 5 cis 90°, 5 cis °210, 5 cis 330° B. 5 cis 30°, 5 cis °60, 5 cis 90° C. 5 cis 90°, 5 cis °180, 5 cis 270° D. 5 cis °210, , 5 cis 270°, 5 cis 330°
Mathematics