Menentukan akar persamaan kuadrat 3x\xb2+4x-5=0 menggunakan rumus abc

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Menentukan akar persamaan kuadrat 3x²+4x-5=0 menggunakan rumus abc​

Jawab:

Penjelasan dengan langkah-langkah:

3x²+4x-5=0

a= 3

b = 4

c = -5

x_{1,2} = \frac{-b \pm \sqrt{b^2-4ac}}{2a}

x_{1,2} = \frac{-4 \pm \sqrt{4^2-4\cdot 3\cdot -5}}{2\cdot3}

x_{1,2} = \frac{-4 \pm \sqrt{16+60}}{6}

x_{1,2} = \frac{-4 \pm \sqrt{76}}{6}

x_{1,2} = \frac{-4 \pm \sqrt{4\times19}}{6}

x_1= \frac{-2+1\sqrt19}{3}

x_1=\frac{-1\sqrt19}{3}

x_2= \frac{-4-2\sqrt19}{6}

x_2= -1\sqrt19

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