Question 814235
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Hi,
6X10 yd pool( 60 yd^2), 28 square yards 
 Area of Pool and Walkway = 88 yd^2
Let x be width of Walkway
 (6+2x)(10+2x) = 88
 4x^2 + 32x + 60 =88
 4x^2 + 32x -28 = 0
  x^2 + 8x - 7 = 0  
 *[invoke quadratic "x", 1, 8, -7]