A wire of 8x is bent into the shape of a square. Express the area A of the square as a function of x

Question

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Answer 1

The full length of the wire is 8x.  A square has 4 equal sides.

 

Each side of the square = 8x / 4 = 2x

 

 

A = (2x)²

A = (2x)(2x)

A = 4x²