(209*144)^2+(209*209)+(209*144)+(144*144)=?
Without use of calculator...

• i think question is wrong
  it is in the form of (a*b)^2 + a^2 + a*b + b^2
• 14 years agoHelpfull: Yes(12) No(1)
• add and subtract a*b
  the equation becomes, (a*b)^2 + a^2 + 2(a*b) + b^2 - a*b
  which is equals to, (a+b)^2 + a*b(ab-1)
• 14 years agoHelpfull: Yes(0) No(4)
• solve the equation you will get 65
• 9 years agoHelpfull: Yes(0) No(0)