Question

9(a+b)^2 - 4(a-b)^2 factorise

Answer 1

Step-by-step explanation:

4(a+b)^2-9(a-b)^2

4(a^2+2ab+b^2)-9(a^2+2ab-b^2)

4a^2+8ab+4b^2-9a^2-18ab+9b^2

4a^2-9a^2+8ab-18ab+4b^2+9b^2

-5a^2-10ab+13b^2

I hope it's helpful

Answer 2

Answer:

-5a^2-10ab+13b^2