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3.9 + 5.7 is equal to —

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(A) 9.6

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(B) 8.6

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(C) 7.6 (Ans)

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(D) 1.6

• Answer is = -66
  consider x=-1,y=0
  then apply to x^2+y^2+2x+1
  so, 1+0-2+1=0
  then, -1^31+(-1)^35= -66
  
• 13 years agoHelpfull: Yes(11) No(14)
• x^2+y^2+2x+1=0
  
  when y=0,
  then
  x^2+2x+1 =0
  (x+1)^2=0
  x= -1
  
  x^31+X^35= (-1)^31 +(-1)^35 = -1-1 = -2
  
• 13 years agoHelpfull: Yes(9) No(4)
• x^2+y^2+2x+1=0
  => (x+1)^2 + y^2 = 0
  now x = -1 and y = 0
  so x^31+x^35= (-1)^31 +(-1)^35 = -1-1 = -2
  
• 10 years agoHelpfull: Yes(8) No(9)