a2+ab+b2=259
b2+bc+c2=1299
c2+ac+a2=499
then a+b+c=?????

• 26
  put a2+ab+b2=(a3-b3)/(a-b) and add three terms
• 10 years agoHelpfull: Yes(4) No(7)
• option plz...
• 10 years agoHelpfull: Yes(2) No(2)
• ans:38.5 make all terms as perfect squares
  
• 10 years agoHelpfull: Yes(2) No(4)
• Wrong Que..
  a^2*b^2+a^2+b^2+1= (a^2+1)(b^2+1)
  by using above one we can write
  a^2*b^2+a^2+b^2+1=260..(1)
  b^2*c^2+b^2+c^2+1=1300..(2)
  c^2*a^2+c^2+a^2+1=500..(3)
  by doing (1)/(2) we will get a^2+1/c^2+1 = 1/5..(4)
  by doing (4)*(3) we will get (a^2+1)^2=10,
  by solving a=3, b=5,c=7
  so a+b+c=15
• 10 years agoHelpfull: Yes(0) No(3)