Knowee
Questions
Features
Study Tools

Find the equation of the following parabola which has vertex at (4,−1) and 𝑥-intercepts at 𝑥=12√+4 and 𝑥=4−12√.

Question

Find the equation of the following parabola which has vertex at (4,−1) and x x -intercepts at x=12+4 x=12\sqrt{+4} and x=412 x=4-12\sqrt{} .

🧐 Not the exact question you are looking for?Go ask a question

Solution

The equation of a parabola in vertex form is given by y = a(x-h)² + k, where (h, k) is the vertex of the parabola.

Given that the vertex of the parabola is (4, -1), we can substitute h = 4 and k = -1 into the equation to get y = a(x-4)² - 1.

The x-intercepts of the parabola are given by x = 12√ + 4 and x = 4 - 12√. These are the roots of the equation, so we can set y = 0 and solve for a.

Setting x = 12√ + 4 in the equation, we get:

0 = a((12√ + 4) - 4)² - 1 0 = a(12√)² - 1 0 = 144a - 1

Setting x = 4 - 12√ in the equation, we get:

0 = a((4 - 12√) - 4)² - 1 0 = a(-12√)² - 1 0 = 144a - 1

Since both equations are equal to zero, we can set them equal to each other:

144a - 1 = 144a - 1

This equation is always true, so there are infinitely many solutions for a. Therefore, the equation of the parabola is y = a(x-4)² - 1 for any real number a.

This problem has been solved

Similar Questions

What are the x-intercepts and the vertex of the parabola represented by y = 2x2 - 5x -12?

The graph of the quadratic is a parabola that passes through the points , , and . What is the -coordinate of the vertex of the parabola?

The vertex form of the equation of a parabola is y = 3(x - 4)2 - 22.What is the standard form of the equation?

If the slope of parabola 𝑦=𝐴𝑥2+𝐵𝑥+𝐶y=Ax 2 +Bx+C, where 𝐴,𝐵,𝐶∈𝑅A,B,C∈R at points (3, 2) and (2, 3) are 16 and 12 respectively.Calculate the value of 𝐴A.

Which of the following represents the x-intercepts and the vertex of the quadratic relation y = −x2 − 6x + 27?

1/3

Upgrade your grade with Knowee

Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.