m3rk098 m3rk098

01-05-2018
Mathematics

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hey can you please help me posted picture of question

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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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