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ALG.2.1

Rearrange formulae - subject appears twice

Change the subject of a formula where the subject appears twice

4 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.

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Grade 5–8 Core 🇬🇧 UK

GCSE Maths - Rearranging Formulas Part 2 - When The Subject Appears Twice (2026/27 exams)

Cognito 197K views

Cognito's clear four-step method for rearranging when the subject appears twice, with two worked examples.

Jump to 0:46Example 1: Making x the subject (Step 1)1:41Step 2: Collect Subject Terms 3:30Step 3: Factorise Subject Terms 3:55Step 4: Isolate the Subject 4:33Example 2: Making b the subject

Grade 5–8 Core 🇬🇧 UK

Rearranging Formulae Where Subject Appears Twice | Algebra | Maths | FuseSchool

FuseSchool - Global Education 40K views

FuseSchool gives a concise, clear demonstration of factorising to make the subject when it appears twice.

Grade 6–9 Core 🇬🇧 UK

Rearranging Harder Formulae

Maths Genie 172K views

Maths Genie works through several harder rearranging problems where you must collect and factorise the subject.

Grade 6–9 Core 🇬🇧 UK

Changing the Subject - Harder Formulae (Higher Only) | GCSE Maths Tutor

The GCSE Maths Tutor 187K views

A thorough higher-tier walkthrough of harder formulae including cases where the subject appears twice.