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Diketahui sebuah persamaan kuadrat ax2 + bx – 3 = 0 memiliki akar-akar yaitu 3 dan -½. Tentukanlah nilai a dan b!

Rani Maharani

Soal

Jawab:

x1 = 3 dan x2 = -½

Persamaan kuadratnya:

(x – 3)(2x + 1) = 0

2x2 – 5x – 3 = 0

Kita sama dengan ax2 + bx – 3 = 0.

Jadi nilai a = 2 dan nilai b = -5.

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