# Question 3: Factorize ( x + y) 2 -14z( x + y) + 49z 2

Question 3: Factorize

Factorizing an expression —

Solution:

Given expression is

We convert this expression into form!

=

This so because here as per formula;

x+y = a

and

z=b

and

=a-b

Insert math as
$${}$$