Class 9 Maths · Chapter 4 · CBSE / NCERT
Exploring Algebraic Identities
Algebraic identities, seen as areas. You’ll learn (a + b)², (a − b)², a² − b² and the cube of a sum, and use them to factorise expressions and simplify algebraic fractions.
9 short lessons · about 44 minutes in all
What you’ll learn
- 1Identity or equation?4 min
- 2The square of a sum, with areas5 min
- 3The square of a difference5 min
- 4Spotting a perfect square5 min
- 5The square of three parts5 min
- 6A big square minus a small square5 min
- 7Factorising with tiles and number pairs5 min
- 8The cube of a sum5 min
- 9Simplifying fractions with letters5 min
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Identity or equation? · about 4 minutes
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More Class 9 Maths
The other 13 chapters.
CH 1Orienting Yourself: The Use of Coordinates8 lessonsCH 2Introduction to Linear Polynomials9 lessonsCH 3The World of Numbers10 lessonsCH 5I’m Up and Down, and Round and Round10 lessonsCH 6Measuring Space: Perimeter and Area10 lessonsCH 7The Mathematics of Maybe: Introduction to Probability9 lessonsCH 8Predicting What Comes Next: Exploring Sequences and Progressions9 lessonsCH 9Propositions and their Converses12 lessonsCH 10How Quantities Combine: Understanding Data10 lessonsCH 11The World of Algorithms10 lessonsCH 12Quadrilaterals11 lessonsCH 13Two Variables, One Line12 lessonsCH 14Math of Space: Surface Area and Volume10 lessons
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