inequation why please elucidate x1*x2+x3*x4

Question

inequation  why please elucidate  x1*x2+x3*x4<=n its maximum when x1=x2, x3=x4

bindu k · Answer

Hi,It seems some information is missing, could you please post full question?Thanks

inequation why please elucidate x1x2+x3x4<=n its maximum when x1=x2, x3=x4