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Verified answer
Persamaan KuadratKelas X
2x² - 4x - 1 = 0 , akar²nya x₁ dan x₂
x₁ + x₂ = -b/a = -(-4) / 2 = 2
x₁x₂ = c/a = - ½
Persamaan baru yang akar²nya (x₁ + 2) dan (x₂+ 2)
(x₁ + 2) + (x₂ + 2) = (x₁ + x₂) + 4
= 2 + 4 = 6
(x₁ + 2)(x₂ + 2) = x₁x₂ + 2(x₁ + x₂) + 4
= - ½ + 2(2) + 4
= - ½ + 8
= 15/2
Persamaan yang baru :
x² - ((x₁ + 2) + (x₂ + 2))x + ((x₁ + 2)(x₂ + 2)) = 0
x² - 6x + 15/2 = 0