2.2.5

Solve Quadratics Graphically

Test yourself

Solving Quadratics - Graphically

We can solve quadratic equations using graphs. This is useful when we can't work out the exact answer so need to estimate.

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Example

  • Roots of a quadratic are the x values where the graph crosses the x axis.
  • The solutions for the graph shown are at +2 and -2.

Jump to other topics

1Proof

2Algebra & Functions

2.1Powers & Roots

2.2Quadratic Equations

2.3Inequalities

2.4Polynomials

2.5Graphs

2.6Functions

2.7Transformation of Graphs

2.8Partial Fractions (A2 Only)

3Coordinate Geometry

4Sequences & Series

5Trigonometry

6Exponentials & Logarithms

7Differentiation

8Integration

9Numerical Methods

10Vectors

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