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f(1/2) = 0
2(1/2)² - 9(1/2) + 3m - 2 = 0
1/2 - 9/2 + 3m - 2 = 0
-8/2 + 3m - 2 = 0
3m - 6 = 0
3m = 6
m = 2
persamaan kuadratnya 2x² - 9x + 4 = 0
⇔(2x - 1)(x - 4) = 0
x = 1/2 atau x = 4
Jadi, akar yang lainnya adalah 4