Solve the equation by completing the square. Express any complex numbers using i notation.x2 + 4x - 8 = 0

A. x = -2 ± 2
B. x = ±2
C. x = 2 ± 2
D. x = -2 ± 2


Answer: A

Mathematics

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A. 1C, 2A, 3B, 4D B. 1B, 2D, 3C, 4A C. 1A, 2D, 3C, 4B D. 1A, 2B, 3C, 4D

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A.

B.
 
C.

D.

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A.

B.

C.

D.

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Find the center (h, k) and radius r of the circle with the given equation. 4x2 + 4y2 - 12x + 16y - 5 = 0

A. (h, k) = (- , 2); r = 
B. (h, k) = (- , 2); r= 
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