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2 4<br />

5. Expand, and collect like terms.<br />

a. 1x 3y212x y2<br />

d. 21x y2 513x 8y2<br />

b. 1x 221x 2 3x 42<br />

e. 12x 3y2 2 15x y2 2<br />

c. 16x 3212x 72<br />

f. 3x12x y2 2 x15x y215x y2<br />

6. Simplify each expression.<br />

a.<br />

3x1x 22 5x 3<br />

1x y21x y2 1x y23<br />

d.<br />

<br />

x 2 <br />

2x1x 22<br />

51x y2 10<br />

b.<br />

y 1y 522 x 7<br />

e. <br />

5x<br />

1y 221y 52 4y 3<br />

2x x 1<br />

c.<br />

4<br />

x 1<br />

f.<br />

x 2 x 2<br />

1h k2 9<br />

21h k2<br />

x 3<br />

7. Factor each expression completely.<br />

a. 4k 2 9<br />

c. 3a 2 4a 7 e. x 3 y 3<br />

b. x 2 4x 32 d. x 4 1<br />

f. r 4 5r<br />

a. a 3 b 3 b. a 5 b 5 c. a 7 b 7 d. a n b n<br />

8. Use the factor theorem to factor the following expressions:<br />

9. If f 1x2 2x 4 3x 2 7 2x, evaluate<br />

a. f 122<br />

b. f 112 c. f a 1 d.<br />

2 b<br />

f 10.252<br />

10. Rationalize the denominator in each of the following expressions:<br />

3<br />

4 V2 2 3V2 3V2 4V3<br />

a. b. c. d.<br />

V2<br />

V3<br />

3 4V2 3V2 4V3<br />

11. a. If f 1x2 3x 2 2x, determine the expression for the difference quotient<br />

f 1a h2 f 1a2<br />

when a 2. Explain what this expression can be used for.<br />

h<br />

b. Evaluate the expression you found in part a. for a small value of h where<br />

h 0.01.<br />

c. Explain what the value you determined in part b. represents.<br />

NEL<br />

CHAPTER 2 63

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