Question 83263
Well it's a good thing you know the rule. Now all you need to do is find out what to put in the rule:
If one of the dimensions is called x, then the other must be 6 feet more than x, in other words, x+6.
And so
l=x+6
w=x
Multiplying those together we get 520
{{{x(x+6)=520}}}
{{{x^2+6x=520}}}
{{{x^2+6x-520=0}}}
{{{(x-20)(x+26)=0}}}
Giving
x=-26 or x=20
Of course the first answer is rejected, meaning the width would be 20 feet and the length is 26 feet.