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

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

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)