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x1+x2=-b/a=-(-3/2)=3/2
x1x2=c/a=-4/2=-2
x1+x2
-1/x1 - 1/x2
-(x1+x2)/x1x2
-(3/2 / -2)
-(3/2 x (-1/2)
-(-3/4)
3/4
x1x2
-1/x1 . -1/x2
1/x1x2
1/(-2)
-1/2
PK baru
x²-(x1+x2)x+x1x2=0
x²-(3/4)x + (-1/2)=0 kalikan 4
maka
4x²-3x-2=0