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21 January, 23:23

The length of a photograph is 1 cm less than twice the width. The Area is 91 cm² find the width and length

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  1. 21 January, 23:37
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    {a*b=91

    {a-1=2b

    a=2b-1

    (2b-1) * b=91

    2b²-b-91=0

    b=7 cm

    other b is negative and can't be a width

    a=2*7-1=13 cm

    Length is 13 cm

    Width is 7 cm
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