Question

what is the factored form of a2 – 121?



(a – 121)(a – 1)

(a – 11)(a 11)

(a 11)(a 11)

(a – 121)(a 1)

Answer 1

on this equation this formula implies: (a2-b2)=(a+b)(a-b)
so the factored form of equation a2-121 will be:
(a+11)(a-11)
hope that helps :)

Answer 2

Answer:

The factored form is given by (a+11)(a-11)

Step-by-step explanation:

We have been given the expression $a^2-121$

We can write $121=11^2$

Thus, we have

$a^2-11^2$

Now, using the formula for difference of squares, which is given by

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

On comparing the above expression, with the given formula, we get a=a, b=11. Thus, we have

$a^2-11^2=(a+11)(a-11)$

Therefore, the factored form is given by (a+11)(a-11)