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

1 Answer
Dec 29, 2017

Image reference.....

Answer#:a=4#

Explanation:

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

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