Question 163849
(14-2x)(11-2x)=80
154-22x-28x+4x^2=80
4x^2-50x+154-80=0
4x^2-50x+74=0
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
x=(50+-sqrt[-50^2-4*4*74])/2*4
x=(50+-sqrt[2500-1184])/8
x=(50+-sqrt1316)/8
x=(50+-36.2767)/8
x=(50-36.2767)/8
x=13.7233/8
x=1.7154 inche squares are cut from all 4 corners.
Proof:
(14-2*1.7154)(11-2*1.7154)=80
(14-3.43)(11-3.43)=80
10.57*7.57)=80
80~80