Question

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


solve using suitable identity

Answer 1

Answer:

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

Using algebraic identity

(a + b)(a - b) = a² + b²

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

» a² - (2b)²

» a² - 4b²

Answer 2

Answer:

a^2 - 4 b^2

Step-by-step explanation:

We have a formula which is

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

So a^2 - (2b)^2

=a^2 - 4 b^2