What you'll learn
Manipulating expressions and solving equations.
Key skills
- Expanding brackets and factorising (including quadratics).
- Solving linear equations, inequalities and simultaneous equations.
- Rearranging formulae (changing the subject).
- nth term of sequences; substitution into functions.
- Straight-line graphs: gradient and y = mx + c.
Exam tips
- Do the same operation to both sides of an equation.
- For quadratics, look for two numbers that multiply and add correctly.
Common mistakes
- Sign errors when expanding negatives.
- Only giving one solution to x² = a (it has ±).