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