Algebra

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The side of a square equals the length of a rectangle. The width of the rectangle is 4 meters longer than its length. The sum of the areas of the square and the rectangle is 48 square centimeters. Find the side of the square

  • Algebra -

    square --- x by x
    rectangle -- x by x+4

    x^2 + x(x+4) = 48
    2x^2 + 4x - 48 = 0
    x^2 + 2x - 24 = 0
    (x+6)(x-4) = 0
    x = -6 or x = 4, but a side cannot be negative

    so the square is 4 by 4

  • Algebra -

    each unit square of the rectangle below represents 1 square inch name the rectangle that show perimeter and name the permeter

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