Question

please answer this question ​

Answer 1

Answer:

(4a²-12a+9)-49b²

[(2a) ²+3²-2*2a*3) ]-(7b) ²

(2a-3) ²-(7b) ²

using identity

a²-b²=(a+b) (a-b)

(2a-3) ²-(7b) ²=(2a+7b-3) (2a-7b-3)