Question 766855
A cube has a surface area of 6x^2+36x+54. Find the length of a side.
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A cube has 6 faces, each is a square.
SA = 6s^2, s = side length
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{{{SA = 6x^2+36x+54 = 6(x^2 + 6x + 9)}}}
{{{x^2 + 6x + 9 = (x+3)^2}}}