SOLUTION: x2+16=0

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Question 525768: x2+16=0
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Solve:
N.B. i+=+sqrt%28-1%29
x%5E2%2B16+=+0 Factor.
%28x%2B4i%29%28x-4i%29+=+0 Apply the zero product rule.
x%2B4i+=+0 or x-4i+=+0 so...
x+=+-4i or x+=+4i
Or you could do it this way...
x%5E2%2B16+=+0 Subtract 16 from both sides.
x%5E2+=+-16 Take the square root of both sides.
x+=+sqrt%28-16%29 or x+=+-sqrt%28-16%29 Simplify.
x+=+4i or x+=+-4i