Question 866044
Rectangle Dimensions Problem:
x is length, y is width.
{{{y=-2+x}}} and {{{xy=15}}} and you want the perimeter.  First solve for x and y.


{{{xy=x(x-2)=15}}}
{{{x^2-2x=15}}}
{{{x^2-2x-15=0}}}
{{{(x+3)(x-5)=0}}}
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{{{highlight(x=5)}}} and therefore, {{{highlight(y=3)}}}.
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perimeter is {{{2(x+y)}}}.