9th grade

a cube has a side that is (5x-3)centimeters long.a.what is its surface area?b.if x=3,what is its surface area

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  1. In a cube all sides are the same length, so the surface area of one face is
    (5x-3)^2
    So the surface area of all 6 faces is
    6(5x-3)^2

    To find what it is for x = 3, sub x=3 into the above expression.

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