Answers

2016-02-28T17:49:38+05:30
Have a look at the image.The answer is a-b/2 or -(a+b)/2.

Hope this may help you

Regards,
Raj
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2016-02-28T19:45:10+05:30
Given that

4x² + 4bx - (a²- b²) = 0

D = b² - 4ac
 
   = (4b)² - (4)(4)(-a² +b²)
  
   = 16b² + 16a² - 16b²
 
   = 16a²
 
  x  = -b + √D / 2a             (or)   -b-√D / 2a
 
     = -4b +√16a² / 2(4)        (or)  -4b - √16a² / 294)
 
     = -4b - 4a / 8 = -(a+b) /2    (or)  -4b + 4a / 8 = a-b / 2 






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