Question

x^2 -4x+85=0

The answer choices are
7+3i, 7-3i
3+7i, 3-7i
2+19i, 2-19i
2+9i, 2-9i

Answer 1

I got x = 2+9i, 2-9i

The answer is D. 2+9i, 2-9i

Answer 2

I could show you the steps if you want to see how I got that.

Answer 3

\[x^2 -4x+85=0\]\[x^2 -4x=-85\]\[x^2 -4x+4=-85+24\]\[x^2 -4x+4=-81\]\[(x-2)^2=-81\]\[x-2=± \sqrt{-81}\]\[x-2=±9i\]\[x=2±9i\]

Answer 4

Yep ^