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Factorise: x^4+x^2+1 |
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Answer» Answer: Consider x4 + X2 + 1 = (x4 + 2x2 + 1) – x2 = [(x2)2 + 2x2 + 1] – x2 = [x2 + 1]2 – x2 It is in the form of (a2 – b2) = (a + b)(a – b) Hence [x2 + 1]2 – x2 = [x2 + 1 + X] [x2 + 1 – x] |
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