Question

25-a^2-b^2-2ab factorise it

Answer 1

Answer:

Step-by-step explanation:

25-a²-b²-2ab

=5²-(a²+b²+2ab)

=5²-(a+b)²

using a²-b²=(a+b)(a-5)

=(5+a+b) { 5-(a+b)}

=(5+a+b)(5-a-b)