Answers

2016-06-19T08:35:12+08:00
16a^2+16b^2+16c^2...multiply it term by term

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2016-06-19T09:31:47+08:00
(a + b + c)^2 = a^2 + b^2 + c^2 + 2ab + 2ac + 2bc


(4a + 4b + 4c)^2 = (4a)^2 + (4b)^2 + (4c)^2 + 2(4a)(4b) + 2(4a)(4c) + 2(4b)(4c) = 16a^2 + 16b^2 + 16c^2 + 2(16ab) + 2(16ac) + 2(16bc) = 16^2 + 16b^2 + 16c^2 + 32ab + 32ac + 32bc


Follow the equation above. Substituet a, b, and c, which serves sa the trems fo the trinomail. Sorry fi it's a littel bit confusign.
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