Question

using suitabl identities,evaluate the 87square-13square

Answer 1

using the formula a2-b2=(a+b)(a-b)
here a=87 and b=13
=(87+13)(87-13)=(100)(74)=7400
therefore 7400 is the right answer according to me. HOPE THIS HELPS YOU. IF YOU FIND THIS HELPFUL PLEASE MARK IT AS BRAINLIEST