Factor completely. If the polynomial is prime, so state.72x2 + 42xy + 6y2
A. (18x + 6y)(4x + y)
B. 6(3x - y)(4x - y)
C. 6(3x + y)(4x + y)
D. prime
Answer: C
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Solve the problem.Find the work done by a force of 17i (newtons) in moving an object along a line from the origin to the point 
(distance in meters).
A. 36.06 J
B. 17
J
C. 51
J
D. 51 J
Use the method of variation of parameters to solve the differential equation.y'' + y = sec x tan x
A. y = C1 cos x + C2 sin x - sin x(x + tan x) + sin x ln|csc x| B. y = C1 cos x + C2 sin x + sin x(x - tan x) + cos x ln|sec x| C. y = C1 cos x + C2 sin x + cos x(x - tan x) + sin x ln|sec x| D. y = C1 cos x + C2 sin x + cos x(x - tan x) + cos x ln|sec x|
Graph the parabola or ellipse. Include the directrix that corresponds to the focus at the origin.r = 
A. 
B. 
C. 
D. 
Complete the sentence so the result is an identity. Let x be any real number. + sin2x = 1
A. csc2x B. tan2x C. sin2x D. cos2x