Question 156302: hello im a homeschool parent and i really need our help
Find the lowest common denominator for each of the sets of fractions
1. 4 5
- ,-
5 12
2. 3 1 5
- ,- ,-
4 3 9
3. 2 7
---- , ------
a^2 b^2 a^5 b
4. 5x^2 14xy 3
------ ------ -------
3y^3 8z^2 9xy^2
5. 2r 7s 15t
------, ------ , ------
35st 5r^3 t^5 7r^7 s^5
6. xy 3y 2x
------ , ------- ,------
(x+y)^2 (x+y)^3 x+y
7. 2 7 9
---, ---, -------
3 ab 3a+3b
8. 4 3
---------- , --------
x^2 + 5x + 6 x^2 - 4
9. 17a 11a^2
----------- , ------------
a^2 - 2a - 3 a^2 - 4a + 3
10. x y+2 y^2
------------- ,------------- ,-------------
x^2 + 3x - 4 x^2 + 5x - 6 x^2 + 10x + 24
11. 5 y+2 y^2
----------- ,------------ ,-------------
y^2 - 25 y^2 + 8y + 15 y^2 - 2y - 15
12. 2x 3y
--------- ,---------
x^2 - y^2 2x + 2y
13. 5 2 3
------ ,------ , ----------
a^3 + 8 a^2 - 4 a^2 - 2a + 4
Change the following fractions to equivalent fractions with the lowest common denominator
14. 4 2 8
--, -- ,---
5 3 25
15. 5 12 4
---- ,----- ,-----
x^2 y xy^2
16. 3a 4b c
----- ,----- ,-----
2b 7c 3a
17. x 2x 1
-------- ,-------- ,---------
x^2 - 36 x - 6 x + 6
18. 5 11
----------- ,-----------
a^2 - 5a - 14 a^2 - a - 6
19. y+2 y-2
-------- ,------------
y^2 - 1 y^2 + 2y + 1
20. z 1 2z
----- ,----- ,------
x-y x+y y-x
21. xy x y
-------------- ,------- ,----------
x^2 + xy + y^2 x - y x^3 - y^3
Answer by oscargut(2103)   (Show Source):
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