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Factorise the Expressions 7psquare2 + 21qsquare2 - Mathematics

Factorise the expressions 7p² + 21q²

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Solution

7p² + 21q² = 7 × p × p + 3 × 7 × q × q = 7(p² + 3q²)

Concept: Expansion of (a + b)2 = a2 + 2ab + b2

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Chapter 14: Factorisation - Exercise 14.2 [Page 223]

Q 3.2 Q 3.1 Q 3.3

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APPEARS IN

NCERT Class 8 Maths Textbook

Chapter 14 Factorisation
Exercise 14.2 | Q 3.2 | Page 223

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Expansion of (a + b)2 = a2 + 2ab + b2

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