Menggunakan Rumus

Jika xdan xadalah akar-akar persamaan kuadrat ax2 + bx + c = 0, maka berlaku

abc

dimana b2 – 4ac disebut diskriminan ( D ).

Latihan Soal

1. Tentukan penyelesaian dari x2 + 5x – 14 = 0

2. Tentukan akar-akar dari 3x2 + 7x – 6 = 0

3. Tentukan penyelesaian persamaan kuadrat 14 + 3x – 2x= 0

 

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