MODERATE EXERCISES - Symbol Manipulation

(6) Solve the following equations.
  
 (a) kx(k - x) = 0
   
 (b) 3x(3x + sqrt(2)) = 0
          
 (c) cx = cx(x + 0.5)

 (d) (2/3)(7x - )(x + 0.21) = 0
		


HINT: 
 
 For each question, use the "zero-product property":
     if  (a)(b) = 0  then  a = 0  or  b = 0 

 
  

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