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Question Number 32418 by hizmzm1 last updated on 24/Mar/18

$$\mathrm{The}\mathrm{number}\mathrm{of}\mathrm{real}\mathrm{roots}\mathrm{or}$$$$x^8-x^5-x+1=0\mathrm{is}\mathrm{equal}\mathrm{to}$$

Commented by hizmzm1 last updated on 27/Mar/18

$$1^8-1^5-1+1=0,\mathrm{hence}1\mathrm{is}\mathrm{root}\mathrm{of}\mathrm{eqn}.\mathrm{then}\mathrm{why}\mathrm{answer}\mathrm{for}$$$$\mathrm{no}.\mathrm{of}\mathrm{roots}\mathrm{is}\mathrm{zero}??$$$$$$

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