Question

select a suitable identity and find the following (2b-a) (2b+c) ​

Answer 1

Answer:

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

= (2b)^2 + (-a + c)2b + (-a)(c)

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

Answer 2

Answer:

4b^2 - (a - c)2b - ac

Step-by-step explanation:

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

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

4b^2 - (a - c)2b - ac