Maths Monster

Units Blog Pricing Start free

GF.9.4

The quadratic formula

Use the formula to solve a quadratic equation

5 hand-picked video lessons for this topic, each checked for relevance and clarity, graded by difficulty and labelled by depth. Press play to watch — nothing loads from YouTube until you do.

Sort

Level

Length

Origin

5 shown

Grade 5–7 Core 🇬🇧 UK

GCSE Maths - Solving Quadratics Using the Quadratic Formula (2026/27 exams)

Cognito 332K views

Polished UK lesson covering coefficients, the plus-minus sign, and both decimal and surd answers.

Jump to 0:10Identifying Coefficients a, b, and c 0:21Example 1: Substituting Values 1:29Calculating Rounded Decimal Answers 2:04Calculating Exact (Surd) Answers 3:26Example 2: Problem

Grade 5–7 Core 🇬🇧 UK

The Quadratic Formula - GCSE Higher Maths

1st Class Maths 80K views

Clear UK GCSE walkthrough of the quadratic formula with a rearrangement example too.

Jump to 0:20That Quadratic Formula 1:00First Example 3:18Second Example with rearrangement

Grade 5–7 Core 🇬🇧 UK

Quadratic formula - Corbettmaths

corbettmaths 187K views

Corbettmaths' trusted UK explanation of using the quadratic formula to solve quadratics.

Grade 5–7 Core 🇺🇸 US

How To Solve Quadratic Equations Using The Quadratic Formula

The Organic Chemistry Tutor 4.7M views

Hugely popular, clear step-by-step tutorial on applying the quadratic formula.

Grade 5–7 Core 🇬🇧 UK

The Quadratic Formula

Maths Genie 133K views

Maths Genie's detailed UK GCSE run-through with several worked examples.