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Sholpan [36]2 years ago

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Given expression to represent the surface area of the rectangular prism is $6x^{3} +4x^{2} +12x$

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Now, finding value of expression by sustituting value of "x" as given.

Surface area of the rectangular prism = $6x^{3} +4x^{2} +12x$

Surface area of the rectangular prism= $6\times 3^{3} +4\times 3^{2} +12\times 3$

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