Q. 5 C5.0( 3 Votes )
Factorise the following:
x + x2 + 1
Answer :
⇒ x2 + x4 + 1
⇒ x4 + 2x2 + 1 – x2
⇒ x4 + 2 × x2 × 1 + 12 – x2
⇒ (x2 + 1)2 – x2
⇒ (x2 + 1 + x)(x2 + 1 – x) 
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