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algebra 2

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The width of a rectangle is 3ft less than the length, the area is 4ft^2 find the length and width

  • algebra 2 - ,

    a=lw
    w=l-3
    therefore
    a=(l-3)l
    and a=4
    therefore
    4=l^2-3l
    l=4(guess&check)

    w=l-3
    w=4-3
    w=1

  • algebra 2 - ,

    L=-2

    because...

    a=lw

    4=(1-3)L
    4=-2L

    divide both sides by -2

    -2=L

  • algebra 2 - ,

    the length is l= -2
    because area does equals length*width
    which would be 4=(1-3)L
    4=2L then you will have to divide both sides bby the negative 2
    -2=L

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