Question

Select a suitable identity and find the following products (2b-a)(2b+c)

Answer 1

Answer:

b-a { 2b^2 - c^2 }

Step-by-step explanation:

(2b-a) (2b+c)=2b^2+2bc-2ab+ac

(2b-a) (2b+c)=2b^2+2bc-2ab+ac = b (2b+c) - a (2b- c)

(2b-a) (2b+c)=2b^2+2bc-2ab+ac = b (2b+c) - a (2b- c) =(b-a) { (2b+c) (2b-c) } =b-a { 2b^2 - c^2 }------[【(a+b)(a-b)=a^2 - c^2 ]】