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x-5=0, maka x= 5
x-2=0, maka x=2
HP={2,5}
Rumus diskriminan (D)= b^2-4ac
ax^2-bx+c=0
x^2-5x+6=0
a= 1, b= -5, c=6
b^2-4ac= (-5)^2 - 4(1)(6)
D= 25-24=1