← 1.3 Quadratic Expressions and Equations 1
Difference of two squares
Mathematics · Grade 10 · about 40 minutes
x<sup>2</sup> - a<sup>2</sup> factorises as (x - a)(x + a), including when the squares hide coefficients.
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- 11 sections of explanation, worked examples and diagrams
- 1 practice task with hints and worked answers
- A quiz that marks itself as you go
- Your progress kept across every subject you take
Other lessons in this sub-strand
- Expanding and factorising
- Solving quadratic equations
- Forming quadratic expressions
- Quadratic identities from area
- Using identities with numbers
- Taking out a common factor
- Difference of two squares
- Perfect-square trinomials
- Factorising when a is not 1
- Completing the square
- Forming quadratic equations
- Solving harder quadratic equations
- The parabola and its intercepts
- Quadratics in real life