Solve the quadratic equation by completing the square.x2 - 5x - 5 = 0
A. 5 ± 3
B. 
C. 
D. 
Answer: D
Mathematics
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Find the power series representation for f(x).f(x) = e4x + e-4x
A. 8x + 
+ 
+ . . .
B. 1 + 
+ 
+ . . .
C. 2 + 
+ 
+ . . .
D. 2 + 8x + 
+ 
+ . . .
Mathematics
Solve and give interval notation for the solution set. Then graph the solution set.4 < 1 - 4x ? 10
A. 
, 
B. 
, 
C.
, 
D.
, 
Mathematics
Solve the problem.If Gloria received a 6 percent raise and is now making $24,380 a year, what was her salary before the raise? Round to the nearest dollar if necessary.
A. $24,000 B. $22,917 C. $23,000 D. $22,380
Mathematics
Simplify. Write your answer in the form a + bi, where a and b are real numbers.Let z = 2 - 4i and w = 2 + 7i. Find zw.
A. 32 + 6i B. -28i2 + 6i - 4 C. -24 - 22i D. 32 - 6i
Mathematics