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α+β = -b/a = -(-5)/3 = 5/3
α.β = c/a = -14/3
akar yg baru:
x₁ = α-3
x₂ = β-3
x₁+x₂ = α-3 + β-3
= α+β-6
= 5/3 - 6
= 5/3 - 18/3
= -13/3
x₁.x₂ = (α-3) (β-3)
= αβ - 3α - 3β + 9
= αβ - 3(α+β) + 9
= -14/3 - 3(5/3) + 9
= -14/3 - 5 + 9
= -14/3 + 4
= -14/3 + 12/3
= -2/3
pers kuadrat baru:
x² - (x₁+x₂)x + x₁.x₂ = 0
x² - (-13/3)x + (-2/3) = 0 --> kedua ruas dikali 3
3x² + 13x - 2 = 0
semoga membantu ya :)
a(x + n)² + b(x + b) + c = 0
Tinggal dimasukkan sekarang :
a(x + n)² + b(x + b) + c = 0
3(x + 3)² - 5(x + 3) - 14 = 0
3(x² + 6x + 9) - 5x - 15 - 14 = 0
3x² + 18x + 27 - 5x - 29 = 0
3x² + 13x - 2 = 0 ← Jawaban
SEMOGA MEMBANTU ^^^^ @azrialakbar13