INTRODUCTORY EXERCISES

(2) 

 Solve for the indicated variable.
    (a) x2 + 2xy - 12 = 0, y
    (b) 2r2 + 2rh = 2500, h
SOLUTION: 
(a) x2 - 12 = -2xy
     x2 - 12 
    --------- = y
       -2x

(b) 2r2 + 2rh = 2500
    2rh = 2500 - 2r2
      
         2500 - 2r2
    h = -------------
             2r

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