3 years ago

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

Mathematics

1 answer:

laila [671]3 years ago

7 0

Answer:

x is approximately equal to 0.34 and -4.34

Step-by-step explanation:

$x^2 + 4x = 1\\x^2 + 4x + 4 = 5\\(x + 2)^2 = 5\\x + 2 = \sqrt{5} \\x = -2 + \sqrt{5}\\x \approx 0.34 \ and -4.34\\\\$

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