Factor the difference of two squares.x4 - 81
A. (x2 - 9)(x2 - 9)
B. (x2 + 9)(x + 3)(x - 3)
C. (x2 + 9)(x2 + 9)
D. prime
Answer: B
Mathematics
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j + 
k; -9? t ? 7
A. -50 B. 400 C. 80 D. -10
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Complete the identity.tan 2x = ?
A. 
B. 
C. - 
D. 
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Determine if the given ordered pair is a solution to the equation.y = 
x - 
, 
A. Yes B. No
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Write the standard equation for the circle.Center at (4, 3), radius 
A. (x - 3)2 + (y - 4)2 = 225 B. (x + 3)2 + (y + 4)2 = 225 C. (x - 4)2 + (y - 3)2 = 15 D. (x + 4)2 + (y + 3)2 = 15
Mathematics