So according to the formula: root sign (square of b -4ac)

Therefore, when the equation has two real roots, it is obtained that the root number (4 -4*65438 squared +0*2t)=0 and the t = 2 of the solution.

When the equation has two real roots, we get: the square of the root number (4 -4*65438+0 * 2t >; T

Let the solutions of the equation be m and n.

So it is1/m+1/n = s.

According to what theorem (Wade's law), it is: m+n=-b/a=-4 (it seems to be this. Please look it up in the book).

m*n=c/a=2t

According to these three equations, we can get the relationship between S and T hunger.