How do you find the vertex and intercepts for #y = (x + 3)^2 – 4#?
3 Answers
Vertex
Explanation:
Set
Add 4 to both sides
Square root both sides
Subtract 3 from both sides
You may if you so choose determine the vertex from this point
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Given
Vertex
Vertex is at
x intercepts are at
Explanation:
Comparing with vertex form of equation
here
y intercept is found by putting
So y intercept is
x intercepts are found by putting
x intercepts are at
graph{(x+3)^2-4 [-10, 10, -5, 5]} [Ans]
Vertex =
y-intercept =
x-intercepts =
Explanation:
First, expand
The x-vertex of a quadratic equation
Plugging in
Now we plug in
So our vertex is
To find the y-intercept of a quadratic equation, plug in
To find the x-intercept of a quadratic equation, plug in
So our y-intercept is