Solve the equation by completing the square. Express any complex numbers using i notation.x2 + 4x = 7
A. x = -1 ± 
B. x = -2 ± 
C. x = 2 + 
D. x = -2 ± 2
Answer: B
Mathematics
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Evaluate. Assume that all variables represent positive numbers. |-8.5|
A. -8.5 B. 17 C. 8.5 D. 0
Mathematics
Find the intercepts of the quadratic function.y + 4 = (x + 2)2
A. x-intercepts: (0, 0) and (-4, 0) y-intercept: (0, 0) B. x-intercepts: (0, 0) and (-4, 0) y-intercept: none C. x-intercepts: (0, 0) y-intercept: (0, 0) D. x-intercepts: (0, 0) and (4, 0) y-intercept: (0, 0)
Mathematics
Solve the absolute value inequality. Other than ?, use interval notation to express the solution set and graph the solution set on a number line.|x + 1| > 0
A. (-1, ?)
B. (-?, -1) ? (-1, ?)
C. (-1, 1)
D. ?
Mathematics
Simplify the complex fraction using Method 1.
A. 
B. k - 6
C. 
D. 
Mathematics