QUIZ 5: Rational expressions and complex fractions

MQ5 home    Quiz 4    Hand out   Test 6

MQ5 QUEST 5A   (answers below)                                                              Mr. Gary Jaye

INSTRUCTIONS:  Express all answers in simplest form and SHOW ALL WORK.
 

In 1-5, simplify the expression. SHOW STEPS and box answer. [1-4 are 5 each, #5 is 7] 

 

6. The LCD of 1  +  1  is ab only when ????                                                     [2] 
                       a        b 
7. Express (4x2y - 8xy2 + 5y)/2xy as a sum.                                                       [3] 
 

 

8. Simplify and leave denominator in factored  form.   [6]               

  xy + 2y2   ¸   xy2 + y3
   x2 – xy           xy – y2   

 

9. Combine into a single fraction and leave denominator in factored form. [12] 

            1          +        1    
    x2 +4x + 3         x2 – 1                                                                               

ANSWERS: 1. -2   2. 2/(x - y)   3. (a2b3)/(b3 + a2)    4. 25y8/x4   5. x - 5   6. LCD(1/a + 1/b) = ab
only when LCM(a, b) = ab   7. 2x - 4y + 5/2x    8. (x + 2y)/[x(x + y)]   9. 2/[(x + 3)(x - 1)]  

MQ5 home    Quiz 4    Hand out    Test 6