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Verified answer
Persamaan Kuadratx² - 3x - 5 = 0
α + β = -b/a = -(-3)/1 = 3
α × β = c/a = -5/1 = -5
Akar2 PK baru :
2α + 2β = 2(α + β) = 6
2α × 2β = 4αβ = -20
PK baru :
x² - (2α + 2β)x + (2α × 2β) = 0
x² - 6x - 20 = 0 ✔