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$y^4-10y^3+5y^2+100y+100=0$ how to solve this equation ?

what will be the approach to solve this question. Breaking $100$ into $84$ and $16$ and then solving could be one .

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  • $\begingroup$ Put your math between dollarsigns (see edit). $\endgroup$ – drhab Jul 30 '15 at 8:12
  • $\begingroup$ You could always plug your values into the fourth formula :). $\endgroup$ – YoTengoUnLCD Jul 30 '15 at 8:15
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Hint : Expand $(y^2-5y-10)^2$.

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