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25 = 3x^2-20x+50
3x^2-20x+25=0
(3x-5)(x-5)
x= 5/3 atau x = 5
Uji Syarat
1.) 3.(5/3)^2 - 20.5/3 + 50 >0 (syarat numerus)
25/3 - 100/3 +50 > 0
25 > 0
2.) 3(5)^2 - 20.5 +50 >0
75-100 + 50 >0
25 > 0
Hp = <5/3, 5>