-1/30+5/2=74/30=37/15
-1/30*5/2=-1/12
所以该方程为
x^2-37/15x-1/12=0
3x^2-37/5x-1/4=0
60x^2-148x-5=0
2.|x1-x2|=√△/|a|
=√5
(x1-1)(x2-1)=x1x2-(x1+x2)+1
=-1+1+1=1
-1/30+5/2=74/30=37/15
-1/30*5/2=-1/12
所以该方程为
x^2-37/15x-1/12=0
3x^2-37/5x-1/4=0
60x^2-148x-5=0
2.|x1-x2|=√△/|a|
=√5
(x1-1)(x2-1)=x1x2-(x1+x2)+1
=-1+1+1=1