Junior Cycle · Algebra Lesson 15 of 21

JCHL Algebra 15: Sketching Quadratic Curves

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You’ll learn

  • Factorise and solve to find the roots — these are where the curve CROSSES the x-axis
  • A positive x² gives a U-shape (smile); a negative x² gives an n-shape (frown)
  • The curve crosses the y-axis at the constant (the number at the end)
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