jakeaperez25 jakeaperez25

29-07-2016
Mathematics

contestada

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

Respuesta :

konrad509 konrad509

29-07-2016

[tex]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[/tex]

So it's the last one.

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