m3rk098 m3rk098
  • 01-05-2018
  • Mathematics
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hey can you please help me posted picture of question

hey can you please help me posted picture of question class=

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11beehshahbaz 11beehshahbaz
  • 01-05-2018
The correct answer is option D

The solution is shown below:

[tex] x^{2} +16 \\ \\ = x^{2} +(4)^{2} \\ \\ = x^{2} -(-1)(4)^{2} \\ \\ = x^{2} -i^{2} (4)^{2} \\ \\ = x^{2} -(4i)^{2} \\ \\ =(x+4i)(x-4i) [/tex]
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