\begin{equation}
\begin{aligned}
f(h) = \pi h^3 -9\pi h^2 +90\\
f'(h) = 3\pi h^2 -18\pi h\\
h_{n+1} = h_n-\frac{f(h_n)}{f'(h_n)}\\
h_{n+1} = h_n - \frac{\pi h_n^3 -9\pi h_n^2 +90}{3\pi h_n^2 -18\pi h_n}\\
h_{n+1} = \frac{3\pi h_n^3 - 18\pi h_n^2 - \pi h_n^3 -9\pi h_n^2 +9}{3\pi h_n^2 -18\pi h_n}\\
h_{n+1} = \frac{2\pi h_n^3-9\pi h_n^2-90}{3\pi h_n^2-18\pi h}
\end{aligned}
\end{equation}
What do I do to center my equations in these case?
gatheredinstead ofaligned. that is intended to center each line independently. you might also gain some benefit from reading theamsmathusers guide --texdoc amsmath. – barbara beeton Aug 23 '17 at 13:46