Question

URGENT TOMORROW THE BOARD EXAM PLEASE HELP ME WITH IT.​

Answer 1

AE^2= AD^2- ED^2...........eq1

AB^2 = AE^2 + BE^2
AB^2 = AD^2 + (BD-ED)^2 -ED^2
AB^2 = AD^2 + BD^2 + ED^2 - 2*BD*ED-ED^2
AB^2 = AD^2 +BD^2 - 2*BD*ED.........eq2
AC^2 = AE^2 + CE ^2
AC^2 = AD^2 + (CD+ED)^2-ED^2
AC^2 = AD^2 + CD^2 + ED^2 + 2CD*ED -ED^2
AC^2 = AD^2 + CD^2 + 2 *CD *ED ........eq3
BD = CD
adding equation 2 and 3
AB^2 + AC^2 = 2( AD^2 + BD^2)