Find the product.(x - 3y)(x - 9y)
A. x - 12xy + 27y
B. x2 - 12xy - 12y2
C. x2 - 12xy + 27y2
D. x2 - 15xy + 27y2
Answer: C
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Write the expression in lowest terms. Assume that all variables represent positive real numbers.
A. 
B. 6 + 6
C. 
D. 6 + 6
Find the composition. If f(x) = 6x2 - 5x and g(x) = 3x, find (g ? f)(x)
A. 6x2 - 10 B. 18x2 - 15x C. 54x2 - 5x D. 18x3 - 15x2
Find the vertices and locate the foci for the hyperbola whose equation is given.
- 
= 1
A. vertices: (-2, 0), (2, 0)
foci: (- 2
, 0), (2
, 0)
B. vertices: (-12, 0), (12, 0)
foci: (-2, 0), (2, 0)
C. vertices: (-12, 0), (12, 0)
foci: (- 2
, 0), (2
, 0)
D. vertices: (0, -12), (0, 12)
foci: (- 2
, 0), (2
, 0)
Find values of x and y such that both fx(x,y) = 0 and fy(x,y) = 0.f(x,y) = x2 + xy + y2 + 2x + 3y
A. x = 
, y = 
B. x = 
, y = 
C. x = - 
, y = - 
D. x = - 
, y = - 