Question

(e) 9c2- a² + 4ab - 4b2​

Answer 1

Answer:

9c^2 - (a-2b) ^2. because a^2+4ab-4b^2=(a-2b)

(3c) ^2 - (a-2b) ^2

(3c - a -2b) ( 3c+ a +2b)