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galben [10]
3 years ago
12

A) Solve x² + 4x - 8 = 0 by completing the square​

Mathematics
1 answer:
Dennis_Churaev [7]3 years ago
4 0

Answer:

x = 2 + 2i, x = 2 - 2i

Step-by-step explanation:

{x}^{2}  - 4x + 8 = 0 \\  \\  {x}^{2}  - 4x  + 4 + 4= 0 \\  \\  {x}^{2}  - 4x +  {(2)}^{2}  =  - 4 \\  \\  {(x - 2)}^{2}  =  - 4 \\  \\ x - 2 =  \pm \sqrt{ - 4}  \\  \\ x - 2 = 2i \\  \\ x = 2  \pm 2i \\  \\ x = 2 + 2i, \:  \:  \: x = 2 - 2i

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Step-by-step explanation:

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Yakvenalex [24]
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4 years ago
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deff fn [24]

Answer:

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Step-by-step explanation:

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3 years ago
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Answer:

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