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Solving quadratics graphically
Read the solutions of a quadratic equation from the x-intercepts of its parabola, and home in on non-exact solutions with a table of values.
⏱ 18 min❓ 10 questions
What you'll be able to do
- ✔I can read the solutions of ax² + bx + c = 0 from the x-intercepts of y = ax² + bx + c
- ✔I can use a sign change in a table of values to find an interval containing a solution
- ✔I can refine a solution to one decimal place and explain how many solutions a quadratic has
How this works
- 1Read the short explanations first — they teach you what you need before each question.
- 2Answer each question, then tap Check. A right answer moves you on automatically; if it's wrong, you'll see a friendly explanation of why.
- 3Finish all 3 steps to see your score — sign in and subscribe to unlock the full lesson and save it.
What's inside
10 questions and 1 quick teaching card, including:
- 🔘Multiple choice — Tap the answer you think is best, then check it.
- ✅Select all that apply — More than one can be right — pick every option that fits.
👪Grown-up tip: sit alongside younger learners for the first few lessons. Read the questions together and chat about the explanations — that's where the real learning sticks.
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Curriculum: AC9M10A03