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Find the Product of 2a + 3b − 4c and a − B − C

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Question

Find the product of 2a + 3b − 4c and a − b − c

Sum
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Solution

(2a + 3b − 4c) × (a − b − c)

= a × (2a + 3b − 4c) − b × (2a + 3b − 4c) − c × (2a + 3b − 4c)

= 2a2 + 3ab − 4ac − 2ab − 3b2 + 4bc − 2ac − 3bc + 4c2

= 2a2 + 3ab − 2ab − 4ac − 2ac − 3b2 + 4bc − 3dc + 4c2

= 2a2 + ab − 6ac − 3b2 + bc + 4c2

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Chapter 14: Fundamental Concepts (Including Angles and their Properties) - Exercise 19 (C)

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Selina Concise Mathematics [English] Class 6 ICSE
Chapter 14 Fundamental Concepts (Including Angles and their Properties)
Exercise 19 (C) | Q 9.6
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