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(3x - 4)(x + 3)=0
3x - 4 = 0 atau x + 3=0
x =4/3 x =-3
persamaan:
x² - ( d + 1 +β +1)x + (d+1)(β+1)=0
x² - (4/3 +1 -3 +1)x + (4/3 +1)(-3+1)=0
x² - (1/3) + 7/3x . -2=0
x² - 1/3x - 14/3=0
agar tidak berbentuk pecahan, semua dikali 3
3x² -x -14=0