Vertex of the graph of f(x) = x 2 + 2x - 15

1 answer:

7 0

Try this explanation:1. This curve is parabola; its equation is y=ax²+bx+c2. Using the formula for 'x' of vertex (x₀=-b/(2a)): x₀=-2/(2*1)=-1.3. If to substitute known x₀ into the equation of the given parabola it is possible to find y₀: y₀=x₀²+2x₀-15=1-2-15=-16.
answer: (-1;-16)

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Have rational roots, than the roots are of the form: $\frac{k \cdot a_o}{p \cdot a_n}, \ where \ k, p \in \mathbb{Z}.$

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