Question

Use suitable identities to expand....(3a+2b-5c)2​

Answer 1

Step-by-step explanation:

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Answer 2

$(3a - 2b + 5c) \\ \\ = > {3a}^{2} + {( - 2b)}^{2} + ( {5c)}^{2} + 2 \times ( (3a) ( - 2b) + ( - 2 b)(5c) + (5c)(3a)) \\ \\ = > {9a}^{2} + {4b}^{2} + {25c}^{2} + 2(( - 6ab + ( - 10bc + 15ca)) \\ \\ = > {9a}^{2} + {4b}^{2} + {25c}^{2} - 12ab - 20bc + 30ca$