Using 3 Points to Find Quadratic Equation in General Form

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SUMMARY

The discussion centers on finding the quadratic equation in general form (ax² + bx + c) using three points: (1,0), (3,0), and (0,-6). The method prescribed by the teacher is y = a(x - p)² + q. The participant successfully determined the value of "a" as -2 but struggled to find "p" and "q". The conversation highlights the importance of using the correct form and method to derive the coefficients, with suggestions to substitute known values back into the equations to solve for the remaining variables.

PREREQUISITES
  • Understanding of quadratic equations and their forms (general and vertex).
  • Familiarity with the method of completing the square.
  • Ability to manipulate algebraic equations and systems of equations.
  • Knowledge of matrix operations for solving linear equations.
NEXT STEPS
  • Learn how to derive the vertex form of a quadratic equation from its general form.
  • Study the method of completing the square to convert between forms of quadratic equations.
  • Explore the use of matrices to solve systems of equations related to quadratic functions.
  • Investigate the implications of using different forms of quadratic equations in problem-solving.
USEFUL FOR

Students learning algebra, educators teaching quadratic equations, and anyone needing to apply quadratic functions in mathematical modeling or problem-solving.

  • #31
D H said:
I think that we should focus on teaching how to find the values of a, p, and q in y=a(x-p)2+q given that y(1)=0, y(3)=0, and y(0)=-6.

Wasn't that done long before this/these thread(s) want bananas? Post #6, which I think was post #2 or #3 before the threads were merged did just that.
 

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