3 years ago

What is the factored form of this expression?

Mathematics

1 answer:

gayaneshka [121]3 years ago

7 0

Answer:

(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

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