Question 1079519
x, amount of increase in each dimension


{{{(x+6)(x+4)=50}}}

-

{{{x^2+10x+24-50=0}}}
{{{x^2+10x-26=0}}}


discrim,  {{{cross(100+4*2*26=308=4*11*7)}}}
{{{100+4*26=204=4*51}}}


{{{x=(-10+2sqrt(51))/2}}}


{{{x=-5+sqrt(51)}}}