Multiply.(4x + 5y)(4x - 5y)
A. 16x2 - 40xy - 25y2
B. 16x2 + 25y2
C. 16x2 + 40xy - 25y2
D. 16x2 - 25y2
Answer: D
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Find the exact value of the expression.tan 345°
A. 
B. 2 + 
C. -2 - 
D. 
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