Factor the polynomial completely.x4 - 4x2 - 12
A. (x2 - 2)(x2 - 6)
B. (x2 + 2)(x2 - 6)
C. (x2 + 2)(x2 + 6)
D. (x2 - 2)(x2 + 6)
Answer: B
Mathematics
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Evaluate the expression.61
A. 
B. 6
C. 1
D. -6
Mathematics
Solve the problem.An electron beam is made to perform a repeated unidirectional sweep across a phosphor-coated screen by a time-periodic sweep voltage, V, given asV(t) = 2t 0 ? t < 2?Find ao (if it is not zero), two nonzero cosine terms (if they exist), and two nonzero sine terms (if they exist) of the Fourier series for the time-dependent voltage.
A. V(t) = 2? - 2
B. V(t) = ? - (2 sin t - sin 2t - ...)
C. V(t) = 2? - 4
D. V(t) = ? - 2
Mathematics
1,580,000 ohms =
a. 1.58 kilohms b. 1.58 milliohms c. 1.58 microhms d. 1.58 megohms e. 1.58 teraohms
Mathematics
Solve for x in the given interval.cot x = - 1, 
? x ? ?
A. 
B. 
C. 
D. 
Mathematics