A quadratic is an equation whereby the highest exponent of the variable is 2; the graph of which forms a parabola.

The relationship between two variables is linear if, when plotted on a pair of axes, a straight line is formed.

Checking and securing understanding of interpreting graphs

Maths

In the future unit, pupils will learn how to extend their understanding of solving equations and extend this to consider inequalities. Pupils will consider a variety of inequalities and ways that their solutions can be represented.

In the prior unit, pupils learnt to solve quadratic equations by factorising and this skill will be required in this unit through manipulating two simultaneous equations to find the solutions. For pupils studying the higher content, solving quadratic equations is required if one of the simultaneous equations is a quadratic.

In this unit pupils will learn to solve a pair of simultaneous equations from different starting points and cases using a variety of strategies.

Simultaneous equations: 2 variables

Equations which represent different relationships between the same variables are called simultaneous equations.

Forming simultaneous equations

Elimination is a technique to help solve equations simultaneously and is where one of the variables in a problem is removed.

Combining equations

Solving simultaneous equations by elimination from a context

Solving algebraic simultaneous equations by elimination

Solving more complex simultaneous equations by elimination

Substitute means to put in place of another. In Algebra, substitution can be used to replace variables with values, terms, or expressions.

The subject of an equation/a formula is a variable that is expressed in terms of other variables. It should have an exponent of 1 and a coefficient of 1

Solving simultaneous linear equations by substitution

Solving simultaneous linear equations graphically

Substitute means to put in place of another. In algebra, substitution can be used to replace variables with values, terms, or expressions.

Simultaneous equations: 2 variables

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These lessons will be removed by end of Summer Term 2025.