Given expression is 25p2−36q2
We notice that the expression is a difference of two perfect squares.
∴ It is in the form of a2−b2.
Hence Identity a2−b2=(a+b)(a−b) can be applied
25p2−36q2=(5p)2−(6q)2
=(5p+6q)(5p−6q)[∵a2−b2=(a+b)(a−b)]
Hence, 25p2−36q2=(5p+6q)(5p−6q)
