Solve by completing the square.x2 + 4x = 9
A. -2 ± 
B. -2 ± 2
C. 2 + 
D. -1 ± 
Answer: A
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Evaluate 
for 
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?
A. 7
B. –7
C. 8
D. 5
Find an equation of an ellipse satisfying the given conditions.Vertices: (0, -7) and (0, 7); length of minor axis: 4
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 10
D. 
+ 
= 1
Solve.xy - x2 = -20x - 2y = 3
A. (5, 1) and 
B. (-5, -1) and 
C. (-5, -1) and 
D. (5, 1) and 
In the problem, P = (x, y) is the point on the unit circle that corresponds to the real number t. Find the exact value of the indicated trigonometric function of t.
?Find tan t.
A. 
B. 
C. 
D. 