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Persamaannya
x²-(x₁+x₁)x+x₁.x₂=0
x²-(1/2+5)x+(1/2).5=0
x²-(11/2)x+(5/2)=0
2x²-11x+5=0
2. x₁=-2 dan x₂=-5/4
Persamaannya
x²-(x₁+x₁)x+x₁.x₂=0
x²-(-2+(-5/4)x+(-2).(-5/4)=0
x²-(-13/4)x+(10/4)=0
4x²+13x+10=0