Resposta:
x=5/6
[tex] - x2 - 4x + 5 = 0 \\ - x \times 2 - 4x + 5 = 0 \\ - 2x - 4x + 5 = 0 \\ - 2x - 4x \\( - 2 - 4)x \\ - 6x \\ -2x - 4x + 5 = 0 \\ - 6x \\ - 2x - 4x + 5 = 0 \\ - 6x + 5 = 0 \\ - 6x + 5 - 5 = 0 - 5 \\ - 6x = 0 - 5 \\ - 6x + 5 - 5 = 0 - 5 \\ - 6x = - 5 \\ - 6x + 5 = 0 \\ - 6x = - 5 \\ - 6x \div ( - 6) = - 5 \div ( - 6) \\ x = - 5 \div ( - 6) \\ - 6x \div ( - 6) - 5 \div ( - 6) \\ x = 5 \div 6 \\ - 6x \div ( - 6) = - 5 \div ( - 6) \\ x = \frac{5}{6} \\ - 6x = - 5 \\ x = \frac{5}{6} \\ resposta \\ x = \frac{5}{6} [/tex]
Explicação passo-a-passo:
Resposta
x=5/6
