how do i express the area as a polynomial?



A square has sides of length 3x-2cm. 





Remember the formula for the Area of the square?



                   A = s^2   or s * s

    if side = 3x - 2, then

                   A = (3x - 2)^2   or (3x - 2) * (3x - 2)

                     = 3x(3x) + 3x(-2) + (-2)3x + (-2)(-2)

                     = 9x^2 - 6x - 6x + 4

                     = 9x^2 - 12x + 4 cm



 

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