Question

Please help me!!!

Sharon factored the polynomial
x^2 + 81 as (x+9)(x-9)
using the difference of 2 squares method. Her teacher marked her andar wrong. Do you agree or disagree. Write a 1 sentence explaining why you agree or disagree with her teacher. You must write a sentence to earn a full credit.

Answer 1

I agree with Sharon's teacher and I believe that the factoring of x^2 + 81 as (x+9)(x-9) is incorrect because the difference of two squares method can only be used to factor polynomials of the form x^2 - a^2, and not x^2 + a^2.

Explanation:

The correct answer is x^2 + 81 can be factored as (x + 9)(x + 9) using the trinomial method.