Answer: x=(±2√21)-8
Explanation:
Add 104 to both sides so we can get x^2+16x+64
x^2+16x+64=104
then factor
(x+8)^2=104
square root both sides
x+8=±√104
simplifying the radical and subtracting 8 gets us this
x=(±2√21)-8
Hope this helps!
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