Question

Factorise: a² - (2a+3b)² ​

Answer 1

Answer:

by using identity (a+b)^2= a^2+2ab+b^2

a^2-4a^2- 2×2a×3b- 9b^2

-3a^2-12ab-9b^2

Answer 2

that is the answer for your question