Question 436147
{{{w(w+2) = (w-1)(w+1) + 27}}}
==> {{{w^2 + 2w = w^2 - 1 + 27}}}
==> {{{2w = 26}}}
w = 13 cm, the width of the cardboard, and
w + 2 = 15 cm, the length of the cardboard.