DDesmos SAT Prep
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Quadratic Roots via Graphing

Find zeros of a quadratic by reading the x-intercepts.

The Desmos trick

Graph the quadratic and click near where it crosses the x-axis. Desmos snaps to the exact root and labels it, confirming your factoring instantly.

  • Type the quadratic directly: y = x^2 - 5x + 6
  • Click near each x-intercept to snap to the exact root
  • Use ^2 for squaring — Desmos accepts standard math notation

Practice questions

Q1What are the roots of y = x^2 - 5x + 6?
Easy
Q2One root of y = 2x^2 + 7x - 15 is x = -5. What is the other root?
Medium
Q3What are the roots of y = x^2 - x - 12?
Easy
Q4One root of y = x^2 + x - 12 is x = 3. What is the other root?
Hard