Question 1061237
x for length
x-6 for width


{{{x(x-6)=10}}}


{{{x^2-6x-10=0}}}
Discriminant is  {{{(-6)^2-4*1*(-10)=36+40=76}}}.
Discriminant is  {{{4*19}}}.


{{{x=(6+- 2*sqrt(19))/2}}}


{{{highlight(x=3+sqrt(19))}}}, only the PLUS form must be chosen.


{{{x-6=3-6+sqrt(19)}}}
{{{highlight(x-6=sqrt(19)-3)}}}