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Question
Find the product of 2a + 3b − 4c and a − b − c
Sum
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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Concept for Unknowns Through Examples with Simple Contexts (Single Operations)
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