Which of the following steps is crucial when graphing a quadratic equation to accurately determine its shape and position?

Finding the vertex and x-intercepts

Describe how dividing a quadratic equation by a constant (like 5 in the video) simplifies the process of finding its roots.

Dividing by a common factor simplifies the coefficients, making the equation easier to factor or solve, without changing the roots.

Grade 10th Grade · Math · 45 min· Big Ideas Math

I can graph quadratic equations by identifying key features such as vertex, axis of symmetry, and intercepts.

Khan Academy · 4:41

Graphing a parabola using roots and vertex | Quadratic equations | Algebra I | Khan Academy

3 key concepts

1
To graph the equation y = 5x² - 20x + 15, first find where the parabola intersects the x-axis by setting y equal to 0.
2
To solve 5x² - 20x + 15 = 0, divide both sides by 5, factor the quadratic expression, and set each factor equal to 0 to solve for x.
3
The vertex of the parabola sits exactly between the roots, so substitute the x-coordinate of the vertex into the original equation to find the y-coordinate.

10 questions · Multiple choice & Short answer

Quick comprehension check

“Find the x-intercepts and vertex of the quadratic equation y = 2x² - 8x + 6. Show your work.”

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