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jakeaperez25
jakeaperez25 jakeaperez25
  • 29-07-2016
  • Mathematics
Answered

Question:Which of the following is a solution of x2 + 8x = −32?
Answers:
 x = 8 − 8i 
x = −8 + 8i 
x = 4 + 4i
 x = −4 + 4i

Verified Answer :

konrad509
konrad509 konrad509
  • 29-07-2016

\(x^2 + 8x = -32\\ x^2+8x+16=-16\\ (x+4)^2=-16\\ x+4 =-\sqrt{-16} \vee x+4=\sqrt{-16}\\ x=-4-4i \vee x=-4+4i\)

So it's the last one.

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