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 Sep30 awarded Explainer Sep24 awarded Autobiographer Sep2 awarded Yearling Oct30 revised Branch cut of $w=\left(\dfrac{z+1}{z-1}\right)^{1/3}$ Improved LaTeX Oct30 comment Find global minimum "Completing the square" means summing and subtracting to your expression other monomials, in order to be able to identify something as the square of a polynomial. Since squares are non-negative, this should help you. As a trivial example of square completion, notice that $x^2 + 2x = x^2 + 2x + 1 - 1 = (x+1)^2 -1 \geq -1$. Oct30 suggested approved edit on Branch cut of $w=\left(\dfrac{z+1}{z-1}\right)^{1/3}$ Sep30 comment Could someone explain what I am missing in regard to this Wronskian? Hi, court, welcome on math.SE! I LaTeXed your equations and formulae. Please, have a look here and learn how to do it! :) Sep30 awarded Informed Sep30 revised Could someone explain what I am missing in regard to this Wronskian? LaTeXed formulae. Sep30 suggested approved edit on Could someone explain what I am missing in regard to this Wronskian? Sep4 revised How to calculate $\lim_{z\to0}\frac{\log(1+z)}{z}$ added 43 characters in body Sep4 answered How to calculate $\lim_{z\to0}\frac{\log(1+z)}{z}$ Sep2 awarded Yearling Aug18 revised Find the value of $\textrm{cosec}^2\left(\frac\pi7\right) +\textrm{cosec}^2\left(\frac{2\pi}7\right)+\textrm{cosec}^2\left(\frac{4\pi}7\right)$ LaTeXed formulae. Aug18 suggested approved edit on Find the value of $\textrm{cosec}^2\left(\frac\pi7\right) +\textrm{cosec}^2\left(\frac{2\pi}7\right)+\textrm{cosec}^2\left(\frac{4\pi}7\right)$ Jul29 comment Searching sum of constants in a polynomial You have a typo in $f(-1)$: should be $-a+b-1=36$. Jul29 revised Find a vector $\mathbf x$ whose image under $T$ is $b$. LaTeXed formulae. Jul29 comment Find a vector $\mathbf x$ whose image under $T$ is $b$. Welcome to math.SE, Sofia! I've edited your post in order to make it more readable. Please, visit the help page, to learn how this site works and also how to typeset your question with $\LaTeX$! =) Jul29 suggested approved edit on Find a vector $\mathbf x$ whose image under $T$ is $b$. Jul29 revised Connected sums and their homology added 146 characters in body