- #1

Abdullah Qureshi

- 16

- 0

Explain why x2 +1 is not a difference of squares and x2 -1 is

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- #1

Abdullah Qureshi

- 16

- 0

Explain why x2 +1 is not a difference of squares and x2 -1 is

- #2

skeeter

- 1,104

- 1

Oh, but it is ...

$x^2+1 = x^2 - (-1) = (x - i)(x + i)$

$x^2+1 = x^2 - (-1) = (x - i)(x + i)$

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