Question 192564
D=discriminant ={{{b^2-4ac}}}  {{{ax^2+bx+c=0}}} 
:
if D>0 2 reals
if D=0 1 real
if D<0 2 complex roots
:
let L be the length and W width A=area
:
A=L*W.........eq 1
L=4W..........eq 2
A=196.........eq 3
:
take L's value from eq 2 and A's value from eq 3 and plug them into eq 1
:
196=4W(W)
:
{{{4W^2-196=0}}}
:
{{{W^2-49=0}}}divided by 4
:
{{{W^2=49}}}
:
W=7
:
L=4(7)=28