Find the Domain of y=-(x-14)²-6: Positive and Negative Analysis

Find the positive and negative domains of the function below:

y=(x14)26 y=-\left(x-14\right)^2-6

❤️ Continue Your Math Journey!

We have hundreds of course questions with personalized recommendations + Account 100% premium

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Find the positive and negative domains of the function below:

y=(x14)26 y=-\left(x-14\right)^2-6

2

Step-by-step solution

The function given is y=(x14)26 y = -\left(x-14\right)^2-6 .

This is a quadratic function in vertex form: y=a(xh)2+k y = a(x-h)^2 + k where a=1 a = -1 , h=14 h = 14 , and k=6 k = -6 . The vertex of the function is at (14,6) (14, -6) and since a=1 a = -1 , the parabola opens downwards.

Step 1: Identify intervals for negative and positive values:
- The vertex at (14,6) (14, -6) is the maximum point of the parabola.
- For the quadratic to have positive values, y y must be greater than 0. Given the vertex and opening direction of the parabola, there are no x x values for which y y is positive because the parabola is entirely below the x-axis.

Step 2: Analyze y y values when x>0 x > 0 and x<0 x < 0 :
- The parabola is below the x-axis (y<0 y < 0 ) for all x x . Therefore, when checking for x>0 x > 0 , the function remains negative for all positive x x .

Conclusion: This shows that the function is not positive for any x x , but is negative for all x x .

Therefore, the positive and negative domains are as followed:

  • x<0: x < 0 : none
  • x>0: x > 0 : all x x

The correct answer is Choice 2.

3

Final Answer

x<0: x < 0 : none

x>0: x > 0 : all x x

Practice Quiz

Test your knowledge with interactive questions

The graph of the function below intersects the X-axis at points A and B.

The vertex of the parabola is marked at point C.

Find all values of \( x \) where \( f\left(x\right) > 0 \).

AAABBBCCCX

🌟 Unlock Your Math Potential

Get unlimited access to all 18 The Quadratic Function questions, detailed video solutions, and personalized progress tracking.

📹

Unlimited Video Solutions

Step-by-step explanations for every problem

📊

Progress Analytics

Track your mastery across all topics

🚫

Ad-Free Learning

Focus on math without distractions

No credit card required • Cancel anytime

More Questions

Click on any question to see the complete solution with step-by-step explanations