Question

Let $b$ and $c$ be constants such that the quadratic $-2x^2 +bx +c$ has roots $3+\sqrt{5}$ and $3-\sqrt{5}$. Find the vertex of the graph of the equation $y=-2x^2 + bx + c$.

Answer 1

x=and that the line has an y-intercept of (0, 1) which could have been determined from the c-value which is 1.-b/2a=-2/2.1=-1