Example 1 Find the vertex of $y=x^2 + 4x +2$. \( \begin{align} \displaystyle y &= x^2 + 4x +2 \\ &= x^2 + 4x + 4 – 2\\ &= (x+2)^2-2 \\ \therefore &(-2,-2) \\ \end{align} \) Example 2 Find the vertex of $y=x^2 – 6x +1 $. \( \begin{align} \displaystyle y &= x^2 – 6x […]
