Question

A tiled floor of a room has dimension m×m sq m. the dimension of the tiles used are n×n sq m. all tiles used are green tiles except diagonal which are red.after some year some green tiles are replaced by red tiles to form an alternate red and alternate green pattern.how many green tiles are removed​

Answer 1

Step-by-step explanation:

Answer:

B. (m−2mn)2−n22n2