What is the factored form of this expression?

x2 - 121

Fill in the values for p and q to complete the factored form of the expression.

(x + 11) * (x - 11)

Step-by-step explanation:

The expression:

x² - 121

is a difference of squares

We notice that √x² = x and √121 = 11

Then

(x² - 121) = (x + 11) * (x - 11)

If we multiply

(x + 11) * (x - 11) = x*x - 11*x + 11*x - (11) * (11)

(x + 11) * (x - 11) = x² - 121

That is what we want to probe