Question

factorise 16a² - 9(b-3a)²​

Answer 1

Step-by-step explanation:

16a^2-9(b-3a)^2

16a^2-9((b) ^2-2(b)(3a) +(3)^2)

16a^2-9(b^2-6ab+9a^2)

16a^2-9b^2+54ab-81a^2

-65a^2-9b^2+54ab

65a^2+9b^2-54ab