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rayaneqds
rayaneqds rayaneqds
  • 18-06-2016
  • Mathematics
Answered

Determine the numerical value of y=(a+1)(b+1), Knowing that ab= -6 and a+b=1

Verified Answer :

JoshEast
JoshEast JoshEast
  • 18-06-2016

y = (a + 1) (b + 1)
Expand the RHS of the equation

y = ab + a + b + 1
Since ab = - 6 and a+b = 1 by substituting the known values into the expanded equation

y = (ab) + (a + b) + 1
   =  (-6) + (1) + 1
   = - 4

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