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karena akarnya kembar, maka D = 0
D = 0
b² - 4ac = 0
(-2a)² - 4(a)(3a-1) = 0
4a² - 12a² + 4a =0
4a = 8a²
a = 2a²
1 = 2a
a = 1/2
ax² - 2ax + 3a -1 = 0
0,5x² -x + 0,5 = 0
x² -2x + 1 = 0
(x-1)(x-1) = 0
akarnya adalah 1