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THE LEARNING STUDIO · MATHS, MADE CLEAR

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Standard 8Mathematics

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STANDARD 9 PRACTICE0 / 15 topics

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India · Standard 8View curriculum reference
STANDARD 8 · FORMULA TO ANSWER

Algebraic identities

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Mathematics

Square of a sum

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Formula & explanation
(a + b)² = a² + 2ab + b²

Variables & units

First value · a
Numeric value · minimum -1000000000, maximum 1000000000
Second value · b
Numeric value · minimum -1000000000, maximum 1000000000

Worked example

(10 + 3)² = 100 + 60 + 9 = 169.

Assumptions

Do not omit the middle term 2ab.

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NCERT/CBSE references. Topic selections are curated practice; board, edition and year requirements vary. These are suggested topic collections, including related practice and enrichment; they are not exhaustive syllabus mappings, university endorsements, or complete exercise solutions. All public calculators stay available to every learner.

Books and source materials
Clear sources. Original explanations.

Source review: 2026-11-02. Book titles follow the NCERT publication list. Class 9 topic alignment uses the CBSE 2026–27 curriculum. Publisher sites can update editions and may occasionally be unavailable.