Answer:
The answer is (x + 7)(x − 7).
Step-by-step explanation:
Given the expression
[tex]x^2-49[/tex]
we have to factorize the above expression completely.
Given expression is
[tex]x^2-49=x^2-7^2[/tex] → (1)
By the identity [tex]a^2-b^2=(a+b)(a-b)[/tex]
Put a=x and b=7, we get
[tex]x^2-7^2=(x+7)(x-7)[/tex]
Eq (1) can be written as
[tex]x^2-49=(x+7)(x-7)[/tex]
∴ Option 2 is correct.
