# equation solving approach for the given equation

$y^4-10y^3+5y^2+100y+100=0$ 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 .

• Put your math between dollarsigns (see edit). – drhab Jul 30 '15 at 8:12
• You could always plug your values into the fourth formula :). – YoTengoUnLCD Jul 30 '15 at 8:15

Hint : Expand $(y^2-5y-10)^2$.