Trigonometry

  • #1
Abdullah Qureshi
16
0
Explain why x2 +1 is not a difference of squares and x2 -1 is
 

Answers and Replies

  • #2
skeeter
1,104
1
Oh, but it is ...

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

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