Factor completely. If the polynomial cannot be factored, say it is prime.x4 - 8x2 - 9

A. (x2 - 1)(x2 + 1)
B. (x2 - 1)(x2 - 9)
C. (x2 + 1)(x2 - 9)
D. Prime

Answer: C

Mathematics

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Find the volume of the solid generated by revolving the shaded region about the given axis.About the y-axis

A. ?
B. ?
C. ?
D. 8?

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Solve the problem.Suppose X and Y have joint PDF   Find the joint PDF g(x, y) of U = X - Y, V =X.

A. g(x, y) = 
B. g(x, y) = 
C. g(x, y) = 
D. g(x, y) = 

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Solve by using the Superposition Theorem:

R1 = 4.7 Kê, R2 = 3.3 Kê, R3 = 5.1 Kê, E1 = 40 V, and E2 = 20 V. Find I1.

a. 0.231 mA
b. 1.222 mA
c. 2.271 mA
d. 4.148 mA
e. 6.419 mA

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Multiply the polynomials and simplify by combining like terms.(x + 3)(x - 3)(2x - 7)

A. 2x3 - 19x2 + 60x - 63 B. 2x3 + 5x2 - 24x - 63 C. 2x3 - 7x2 - 18x + 63 D. 2x3 - 7x2 + 18x - 63

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