- 1. What is the least common multiple of
x2-4x , x2-2x-8and (x-4) is
A) x(x - 4)(x + 2). B) x(x +4)(x+2). C) x(x -4)(x - 2). D) x(x - 4).
- 2. Perform the indicated operation
(x3-4x)/(x3-2x2)
A) x(x-2) B) x(x+2) C) x+2 D) (x+2)/x
- 3. Multiply rational expressions
((yx4)/(xy2)) . (y/x2)
A) x B) x2 C) xy2 D) xy
- 4. Divide rational expressions
((x-2)/x) / (2-x/x)
A) 1 B) -1 C) x D) x-2
- 5. Simplify the rational expression
(x4-16) / (x3+4x)(X2-4)
A) (x-2)/x B) 1/X C) (X-2)(x) D) X+2
- 6. Simplify the rational expression
-30bc/12cb2
A) (-5b/2) B) (-5/2b) C) (5/2b) D) (5b/2)
- 7. Write as one fraction
(-3mn4/21nm2) . (-7m/n3)
A) -m/n B) 1 C) m/n D) -1
- 8. Perform the indicated operation.
(1/x) - (x/x2)
A) x B) 1/x2 C) 1/x D) 0
- 9. Find the LCM of
10ab2, 105a3b2c, and 50ab2c3
A) 5abc B) 10abc C) 1050a3b2c2 D) 1050a3b2c3
- 10. Find the LCM of
( 2x3 – 9x2 – 5x ) and ( x4 – 10x3 + 25x2)
A) x2(2x - 1)(x – 5) B) x2(2x + 1)(x – 5)2 C) x(2x + 1)(x – 5) D) x(2x + 1)(x –+5)
- 11. Find the LCM of
(x2-5x+ 6),and (5 x2 -10x)
A) 5(x-3)(x-2) B) 5x(x+3)(x-2) C) 5x(x-3)(x-2) D) 5x(x-3)(x+2)
- 12. Find the LCM of (6,8,4)
A) 48 B) 24 C) 2 D) 12
- 13. Find the LCM of 12xy2, 4yx2
A) 12x2.y2 B) 12x.y2 C) 12x.y D) 4x.y
- 14. Find the LCM of
3x3, 6x2,and 4x
A) 24x3 B) 3x C) 2x D) 24x
- 15. Simplify the rational expression
(2 x 2 + x – 6) /(5 x + 10)
A) 2(x-3)/5 B) 2(x+3)/5 C) (x-3)/5 D) 2(x-3)
- 16. Perform the indicated operation (3/x)+(1/x)-(2x/x2)
A) 2/x B) x C) 1/x D) 8/x
- 17. Perform the indicated operation 2/(x2 -4) - (x/4-x2)
A) 1/(2-x) B) 1/(x+2) C) 1/(x2 -4) D) 1/(x-2)
- 18. Simplify the rational expression (x3-x)/(x2-1)
A) x+1 B) x C) x-1 D) (x2-1)
- 19. find the LCM of 2yx2, 10x3.y2, 8xy2
A) 160x3.y2 B) 40x3.y2 C) 40x3.y3 D) 80x3.y2
- 20. Perform the indicated operation 1/(x-2) -1/(x+2) +1/(x2-4)
A) (2x-1)/(x2-4) B) 2x/(x2-4) C) 1/(x2-4) D) 5/(x2-4)
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