00:00we solve this question using two methods method number one one zero five
00:05multiply one zero five so five five twenty five five zero so two comes five
00:13one five again zero one five one zero one one so five two ten one here one one
00:23now another method one zero five equals hundred plus five square square so
00:32hundred plus five square means first square we have an identity a plus B whole
00:39square means a square plus B square plus two a B so using this identity we can
00:49write hundred square plus five square plus two multiply hundred multiply five so
00:56hundred hundred ten thousand plus twenty five plus thousand two five ten ten
01:03multiply hundred thousand so this is eleven thousand twenty five choose which one
01:08method you like
