decodrafting decodrafting

18-12-2020
Mathematics

contestada

Solve x^2+4x=1 for x by completing the square

Respuesta :

jacobEwing jacobEwing

18-12-2020

Answer:

x is approximately equal to 0.34 and -4.34

Step-by-step explanation:

[tex]x^2 + 4x = 1\\x^2 + 4x + 4 = 5\\(x + 2)^2 = 5\\x + 2 = \sqrt{5} \\x = -2 + \sqrt{5}\\x \approx 0.34 \ and -4.34\\\\[/tex]

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