The sum of the rotts of a quadratic equation is equal to -b/a
in the line equation 3x square+4x-7=0
in the above equation,
for the above equation,
1,-7/3 are the roots
when we add these both 1+(-7/3)=1-7/3=3-7/3=-4/3=-b/a
=>sum of the roots is equal to -b/a.
please pick as the best