Question 1083629
{{{(11+2x)(15+2x)<=320}}}, the FRAMED ART not be be more than 320 square inches.


{{{11*15+30x+22x+4x^2<=320}}}


{{{4x^2+52x+11*15-320<=0}}}


{{{4x^2+52x-155<=0}}}


-
discriminant  {{{52^2+4*4*155=5184=72^2}}}


{{{x=(-52+72)/(2*4)}}}, PLUS form because x must not be a negative value.


{{{x=20/8=10/4=5/2=highlight(2&1/2)}}}
Frame must not be more than 2.5 inches wide.