28^2-27^2
With any identity
Urgent
Answers
Answered by
0
answer is 55
...................................................................................................
Answered by
0
Answer:
28²-27²=(30-2)²-(30-3)³
={(30)²+(2)²-2*30*2}-{(30)²+(3)²-2*30*3
={900+4-120}-{900+9-180}
=776-729=47
Similar questions