Question

resolve pela fórmula resolvente​

Answer 1

${x}^{2}-x-6=0$

$\Delta={(-1)}^{2}-4.1.(-6)$

$\Delta=1+24$

$\Delta=25$

$x=\frac{-(-1)±\sqrt{25}}{2.1}$

$x=\frac{1±5}{2}$

$x'=\frac{1+5}{2}=\frac{6}{2}=3$

$x''=\frac{1-5}{2}=-\frac{4}{2}=-2$

$s=\left\{-2,3\right\}$

Answer 2

Resposta:

Letra A {3, -2}

Explicação passo-a-passo:

A= 1 B= -1 C= -6

Δ= (-1)²- 4 × 1 × (-6)

Δ= 1 + 24

Δ= 25

x= 1 +- √25 = 1 +- 5

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2×1 2

x¹= 1 - 5 = -4 = -2

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2 2

x²= 1 + 5 = 6 = 3

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2 2