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A square green rug has a blue square in the center.the side length of the blue square is x inches .the width of the green band that surrounds the blue square is 6 in.What is the area of the green band?

  • Algebra -

    since the square has side x, the surrounding area has side 6+x+6 = x+12

    So, the green area is (x+12)^2 - x^2 = 24x+144

  • Algebra -

    36-x^2 in.

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