• Brainly User
Your answer is :- 

Using (a+b)(a-b) = a² - b²

We get = 6.25l² - 0.25m²

I hope it will help u if so please mark it brainiest answer......................
1 1 1
thanx fr the help 
never mind
i request you to see the sum very carefully the sum is [2.5-0.5][2.5-0.5] so in the both the side the simble is - so this cannot be solved by this property