Question 604292
Let frame width and length = 7 + 2x (plus x on both sides, so it makes 2x)


(7 + 2x)*(7 + 2x) - 7*7 = 32
49 + 14x + 14x + 4x^2 - 49 = 32
{{{4x^2 + 28x = 32}}}
{{{4x^2 + 28x - 32 = 0}}}
(divide all by 4)
{{{x^2 + 7x - 8 = 0}}}
(x + 8)(x - 1) = 0
x + 8 = 0 or x - 1 = 0
x = -8 or x = 1
because the size can't be a negative number, so we take x = 1


so the frame width and length are the same, that is 7 + 2*1 = 7 + 2 = 9 inches