11-6 Skills Practice. Adding and Subtracting Rational Expressions. Find each sum or difference. 1. 2y. â. 5. + y. â. 5. 3y. â. 5. 2. 4r. â. 9...

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DATE

11-6

PERIOD

Skills Practice Adding and Subtracting Rational Expressions

2y 5

y 5

3y 5

1. − + − −

5r 4r 2. − +− r

3 t+3 3. − - −t −

4. − - − −

7

9

7 7

x+2 3

x+5 3

2x + 7 3

Lesson 11-6

Find each sum or difference. 9

c+8 4

c+6 4

1 2

g+2 4

g-8 4

g-3 2

5. − + − −

6. − + − −

x 1 -− 1 7. −

3r r − 8. − -−

x-1

x-1

r+3

r+3

2r r+3

Find the LCM of each pair of polynomials.

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9. 4x2y, 12xy2 12x 2y 2

10. n + 2, n - 3 (n + 2)(n - 3)

11. 2r - 1, r + 4 (2r - 1)(r + 4)

12. t + 4, 4t + 16 4(t + 4)

Find each sum or difference. 5x 2x 15x - 2xy − 14. − -− 2 2

5 2 5r - 8 − -− 13. − 2 2 4r

r

x 4 -− 15. − x+2

3y

4r

x-1

b-4

x2 - 5x - 8 (x + 2)(x - 1)

d2 + d + 1 d-1 3 − 16. − -−

b2 - 2b - 2 (b - 1)(b - 4)

2k2 - k + 5 k k-1 − 18. − +−

2

x - 2x + 15 x 3x + 15 + − − 19. − 2 x - 25

Chapter 11

x+5

9y

−

b 2 − +− 17. − b-1

9y

(x + 5)(x - 5)

d-2

k-5

d+5

k+5

(d - 2)(d + 5)

(k - 5)(k + 5)

x+2 x-2

x2 + x - 7 (x - 2)

x-3 20. − +− − 2 2 x - 4x + 4

39

Glencoe Algebra 1