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x^2 - 50x + 600 = 0
(x-30)(x-20) = 0
x1 - 30 = 0
x1 = 30
x2 - 20 = 0
x2 = 20
Sekian ^_^
p + q = -50
p x q = 600
Tentu akan dipilih pasangan bilangan p = -20, q = -30
Sehingga untuk itu:
Menghasilkan akar persamaan:
x₁ - 20 = 0, sehingga x₁ = 20
x₂ - 30 = 0, sehingga x₂ = 30
Dan berlaku sebaliknya.