What is the answer and steps for this? Given that ${(a + b + c)}^{2} = 3 (a^{2} + b^{2} + c^{2})$ $(a+b+c)^2=3(a^2+b^2+c^2)$ and $a + b + c = 12$ $a+b+c=12$ . find the value of a. Urgent, please show steps. Thanks a lot😊

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What is the answer and steps for this? Given that ${(a + b + c)}^{2} = 3 (a^{2} + b^{2} + c^{2})$ $(a+b+c)^2=3(a^2+b^2+c^2)$ and $a + b + c = 12$ $a+b+c=12$ . find the value of a. Urgent, please show steps. Thanks a lot😊

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Answer 1 · 2017-12-29T11:33:50

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Answer $: a = 4$ $:a=4$

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![my http://notebook...](https://useruploads.socratic.org/CekqiLWOR0y5yxNHos6E_New_Doc_2017-12-29_%281%29_1%5B1%5D.jpg)

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What is the answer and steps for this? Given that ${(a + b + c)}^{2} = 3 (a^{2} + b^{2} + c^{2})$ $(a+b+c)^2=3(a^2+b^2+c^2)$ and $a + b + c = 12$ $a+b+c=12$ . find the value of a. Urgent, please show steps. Thanks a lot😊

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What is the answer and steps for this? Given that (a+b+c)^2=3(a^2+b^2+c^2)(a+b+c)2=3(a2+b2+c2)(a+b+c)^2=3(a^2+b^2+c^2) and a+b+c=12a+b+c=12a+b+c=12. find the value of a. Urgent, please show steps. Thanks a lot😊

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Explanation:

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What is the answer and steps for this? Given that ${(a + b + c)}^{2} = 3 (a^{2} + b^{2} + c^{2})$ $(a+b+c)^2=3(a^2+b^2+c^2)$ and $a + b + c = 12$ $a+b+c=12$ . find the value of a. Urgent, please show steps. Thanks a lot😊