Question 419342
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b>
Hi
factoring
 5n^2-7n+2=0     an^2 + bn + c
{{{n = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
{{{n = (7 +- sqrt(9 ))/(10) }}}
{{{n = (7 +- sqrt(9 ))/(10) }}}
{{{n = (7 +- 3)/(10) }}}
   n = 10/10 = 1  and n = 4/10 = 2/5
 5(n-1)(n-2/5) = 0
Note:SUM of the inner product(-n) and the outer product(-2/5n) = -7/5n
                                                     5*-7/5n = -7n