IGCSE Maths Edexcel A 4MA1

understand and use the symbols >,<, ⩾ and ⩽

*To include double-ended inequalities

e.g. $1 < x \leq 5$*

understand and use the convention for open and closed intervals on a number line

solve simple linear inequalities in one variable and represent the solution set on a number line

$3x - 2 < 10$, so $x < 4$

$7 - x \leq 5$, so $x \leq 2$

$3 < x + 2 \leq 5$, so $1 < x \leq 3$

represent simple linear inequalities on rectangular Cartesian graphs

Shade the region defined by the inequalities $x \geq 0$, $y \geq 1$, $x + y \leq 5$

identify regions on rectangular Cartesian graphs defined by simple linear inequalities

Conventions for the inclusion of boundaries are not required

solve quadratic inequalities in one unknown and represent the solution set on a number line

$x^2 \leq 25$

$4x^2 > 25$

$x^2 + 3x + 2 > 0$

identify harder examples of regions defined by linear inequalities

Shade the region defined by the inequalities $~x \leq 4$, $y \leq 2x + 1$, $5x + 2y \leq 20$