Question

qual ea resposta 3x²+x-1=​

Answer 1

3x² + x — 1 = 0

a=3 ; b = 1 ; c = —1

Lembrando que:

∆ = b² — 4.a.c

∆ = 1² — 4 . 3 . (—1)

∆ = 1 + 12

∆ = 13

$x_{1,2}=\frac{-b\pm\sqrt{\Delta}}{2.a}$

$x_{1,2}=\frac{-1\pm\sqrt{13}}{2.3}$

$x_{1,2}=\frac{-1\pm\sqrt{13}}{6}$

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