Equations, inequalities and modulus

By the end you’ll be able to

• Solve polynomial and rational equations, identifying and rejecting invalid roots where necessary.
• Solve linear and quadratic inequalities and express solutions using set or interval notation.
• Determine solution sets for inequalities involving products or quotients by sign analysis.
• Interpret and solve equations and inequalities involving modulus, including forms such as $|f(x)|=a$, $|f(x)|<a$ and $|f(x)|>a$.