Question

factorise:-
a. 9(x+y)^2 - x^2
b. (2m+3n)^2 - (3m+2n)^2​

Answer 1

2. $9( {x}^{2} + 2xy + {y}^{2} ) - {x}^{2}$
3. $9 {x}^{2} + 18xy + 9 {y}^{2} - {x}^{2}$
4. $8 {x}^{2} + 18xy +9 {y}^{2}$
5. $8 {x}^{2} + 9y(2x + y)$