Question

What is the factored form of this expression?

x2 − 81

Answer 1

Answer:

Step-by-step explanation:

x² - 81 = x² - 9² = (x + 9) (x - 9)              

a² - b² = (a + b)(a - b)

Answer 2

Answer:

(x+9) (x-9)

Step-by-step explanation:

This expression is in the form a2 − b2, so use the difference of squares rule to factor the expression:

x^2-81=x^2-9

THIS IS the RIGHT ANSWER AND I PROOF..