Subtract the sum of 3l-4m-7nsquare and 2l+3m-4nsquare from the sum of 9l+2m-3nsquare and -3l+m+4nsquare Share with your friends Share 3 Lovina Kansal answered this Dear student We have,9l+2m-3n2-3l+m+4n2-3l-4m-7n2+2l+3m-4n2=6l+3m+n2-5l-m-11n2=6l+3m+n2-5l+m+11n2=l+4m+12n2 Regards 0 View Full Answer Ayush answered this 9l+2m-3n2 + (-3l+m+4n2 ) - {(3l-4m-7n2 ) + (2l+3m-4n2 )= 9l+2m-3n2 -3l+m+4n2 -3l+4m+7n2 + 2l+3m-4n2= 9l-3l-3l+2l + 2m+m+4m+3m - 3n2+4n2+7n2-4n2=21+10m+4n2 1 Aryaman Raj answered this the answer is :- l+2m-10n sq. 1
