geometry

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The area of a rectangle is given by A = x2 + 4x – 5. Find the value of x if the total area of the rectangle is equal to 7 square units.

  • geometry -

    7 = x^2 + 4 x -5

    x^2 + 4 x - 12 = 0

    (x+6)(x-2) = 0
    x = 2 (negative 6 not useful)

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