Question 690590
{{{A = LW}}}


{{{LW = A}}}


{{{(x+8)*x = 425}}}


{{{x(x+8) = 425}}}


{{{x^2+8x = 425}}}


{{{x^2+8x - 425 = 0}}}


{{{(x-17)(x+25) = 0}}}


{{{x-17=0}}} or {{{x+25 = 0}}}


{{{x=17}}} or {{{x = -25}}}


Toss out the negative value of x to get the only solution to be {{{x=17}}}


So...


Length: 25 ft (since this is 8 more than 17)

Width: 17 ft