Originally Posted by

**skeeter** True or False. The graph r(x) = (2x-1)/(x+2)(x-1) changes signs at x = -2. Justify your answer.

complete a sign chart

2). Which of the following is the solution to (1)/(x+2)^2 ≥ 0?

a. (-2,∞)

b. All x ≠ -2

c. All x ≠ 2

d. All real numbers

e. There are no solutions

use some common sense ... what can you say about the sign of 1/(x+2)^2 for all x except x = -2 ???

3). Which of the following is the solution to (x^2-1)^2 ≤ 0?

a. {-1,1}

b. {1}

c. [-1,1]

d. [0,1]

e. There are no solutions

common sense again ... what is the sign of (x^2-1)^2 for all x except x = 1 and x = -1 ???