be real numbers such that 
.
of side length 
lies in the union of five equilateral triangles of side length 
,
and 
such that 
and 
is a prime number
is a polynomial of degree 
such that
.
Y by Adventure10, Mango247
On the plane are given four distinct points 
on a line 
in this order, at the mutual distances 
.
(a) Construct (if possible) a point
outside line such that 
.
(b) Prove that such a point exists if and only if 
on a line 
in this order, at the mutual distances 
.(a) Construct (if possible) a point
outside line such that 
.(b) Prove that such a point
exists if and only if 
