Find the vertex of the parabola whose equation is y = x^2 + 8x + 12.
The vertex of a parabola is the point where the parabola crosses its axis of symmetry. If the coefficient of the x 2 term is positive, the vertex will be the lowest point on the graph, the point at the bottom of the “ U ”-shape.
The vertex of the parabola whose equation is y = x^2 + 8 x + 12 will be :
(x , y) = (-4,-4)
Answer:
The vertex of the parabola is (-4,-4).
Step-by-step explanation:
If a quadratic function is defined as
\(y=ax^2+bx+c\) ... (1)
Then the vertex of the function is
\(Vertex=(\frac{-b}{2a},f(\frac{-b}{2a}))\)
The given function is
\(y=x^2+8x+12\) .... (2)
From (1) and (2), we get a=1,b=8 and c=12.
\(\frac{-b}{2a}=\frac{-8}{2(1)}=-4\)
Substitute x=-4 in the given equation.
\(f(\frac{-b}{2a})=f(-4)=y=(-4)^2+8(-4)+12\)
\(y=16-32+12=-4\)
Therefore the vertex of the parabola is (-4,-4).