# Math Help - real root of an equation plzz help me

1. ## real root of an equation plzz help me

any help would be appreciated

2. ## Re: real root of an equation plzz help me

When $\varepsilon=0$ the real root is $-1$, so expand the root as a power series in $\varepsilon$ as $x=-1+a\varepsilon+O(\varepsilon^2)$ ...

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