Question

determine if the expression shown can be factored using differences of two squares x^2 +1
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Answers

GPT-4o mini
The expression \( x^2 + 1 \) cannot be factored using the difference of squares formula. The difference of squares formula states that \( a^2 - b^2 = (a - b)(a + b) \).

In the case of \( x^2 + 1 \), it does not take the form of a difference (subtraction) and instead is a sum.

However, you can express \( x^2 + 1 \) in terms of complex numbers, since it can be rewritten as follows:

\[
x^2 + 1 = x^2 - (-1) = (x - i)(x + i)
\]

where \( i \) is the imaginary unit. But in the context of real numbers, \( x^2 + 1 \) cannot be factored further, because there are no real numbers \( a \) and \( b \) such that \( a^2 = -1 \).

So to summarize, \( x^2 + 1 \) cannot be factored using the difference of squares, as it is a sum rather than a difference.