Question

which type of identity is (2a+7)(2a-7)​

Answer 1

Answer:

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

Step-by-step explanation:

(2a+7) (2a-7)

(a + b) (a - b), where a = 2a, b = 7

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

(2a+7) (2a-7) = (2a)^2 - (7)^2

                     =  4a^2 - 49