mohon di bantu ya, isikan so'alan d bawa ini yg d buletin aja.

3x²+2x-4=0 dimana a=3, b=2 dan c =-4

x1+x2=-b/a=-2/3
x1.x2=c/a = -4/3

(x1)²+(x2)²
=(x1+x2)²-2.x1x2
=(-2/3)²-2(-4/3)
=4/9+8/3
=4/9+24/9
=28/9

1/x1 + 1/x2
=(x1+x2)/(x1.x2)
=(-2/3) / (-4/3)
=-2/3 × 3/-4
=-2/-4
=1/2