Hello, I am wondering how this equation got from here: $\displaystyle (y^3)(y + 1) - (y + 1) = 0$ to here: $\displaystyle (y + 1)(y^3 - 1) = 0 $ and what any relevant tips/rules might be. Thanks.
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Originally Posted by NachoNacho Hello, I am wondering how this equation got from here: $\displaystyle (y^3)(y + 1) - (y + 1) = 0$ to here: $\displaystyle (y + 1)(y^3 - 1) = 0 $ and what any relevant tips/rules might be. Thanks. $\displaystyle (y^3)(y + 1) - {\color{red}1} (y + 1) = 0$ (y + 1) is common to each term on the left. Factorise in the usual way.
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