Question

Qu Evaluate using the suitable Identities
i) (3a-2b+c)²

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Answer 1

Step-by-step explanation:

$\\ {(a + b + c)}^{2} = {a}^{2} + {b}^{2} + {c}^{2} + 2ab + 2bc + 2ca \\ {(3a - 2b + c)}^{2} \\ = {(3a)}^{2} + { (- 2b)}^{2} + {(c)}^{2} + 2(3a)( - 2b) + 2( - 2b)(c) + 2(c)(3a) \\ = 9 {a}^{2} + 4 {b}^{2} + {c}^{2} - 12ab - 4bc + 6ac$

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