Question

tell me this question ​

Answer 1

Step-by-step explanation:

by using identity :

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

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

( 2a - 7 )²

4a² - 49

Answer 2

Answer:

(a+b) (a-b) = a2-b2

2a2-7(7)

4a2-49

Step-by-step explanation:

Here square is denoted by capital 2