Use the discriminant to find what type of solutions (two rational, two irrational, one rational, or two nonreal complex) each of the following equations has. Do not solve the equation.x2 - 6x + 9 = 0
A. two rational solutions
B. one rational solution
C. two irrational solutions
D. two nonreal complex solutions
Answer: B
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Find the extreme values of the function and where they occur.y = x2e-x + 2xe-x
A. Minimum value is 2e
(1 - 
) at x = -
; maximum value is 2e-
(1 + 
) at x = 
.
B. Minimum value is 2e
(1 - 
) at x = -
; no maximum value.
C. Maximum value is 2e-
(1 + 
) at x = ; no minimum value.
D. None
Solve this equation.14z = -28
A. z = 28 B. z = -28 C. z = 2 D. z = -2
Find the indicated cross product.v = -2i - 3j, w = 5i + 3kFind w × v.
A. -15i - 9j + 9k B. 9i - 6j - 15k C. -15j - 6k D. 6i - 9j - 15k
Solve the problem.Let P = (x, y) be a point on the graph of y = 
. Express the distance d from P to the point (1, 0) as a function of x.
A. d(x) = 
B. d(x) = x2 - x + 1
C. d(x) = 
D. d(x) = x2 + 2x + 2