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= 0
a = 2
b = -1
c = -3
Rumus persamaan kuadratik:
Jika menggunakan (+) Maka:
x =
Jika menggunakan (-) Maka:
x =
x = 1.5,-1
jadi : (x-1.5)(x+1) = 0, atau (2x-3)(x+1) = 0