Question

(2a+b) (2a-b)= share​

Answer 1

we know that (a+b) (a-b) = $a^{2} - b^{2}$

so 2a+b ) (2a-b) = $2a^{2} - b^{2}$

and multiplication of 2 only applies for a bcoz it is inside brackets and left of a

Answer 2

Answer:  4a²-b²

Concept: Here identity (a+b)(a-b)=a²-b² will be used to solve this question

Given 4a²-b²: (2a+b)(2a-b)

To find: multiplication of (2a+b)(2a-b)

Solution:

In the chapter 'Polynomial' in Algebra we have learnt some identities. In this question we use below identity

(a+b)(a-b)=a²-b²

now by above identity

(2a+b)(2a-b)= 4a²-b²

Hence the answer of this question is 4a²-b²