bantuin dong..... pake cara

3x²-15x+12=0
x1+x2=-b/a=-(-15/3)=5
x1x2=c/a=12/3=4

x1+x2
(3x1-2) + (3x2-2)
3(x1+x2)-4
3(5)-4
11

x1x2
(3x1-2)(3x2-2)
9x1x2-6(x1+x2)+4
9(4)-6(5)+4
36-30+4
10

jadi Pk barunya

x²-(x1+x2)x + x1x2=0
x²-11x+10=0

opsi jawaban B