Asked by Mitch n' Joey

Which quadratic equation has roots -1+4i and -1-4i ?
A. x^2+2x+2=0
B. 2x^2+x+17=0
C. x^2+2x+17=0
D. 2x^2+x+2=0

I'm having difficulty with this question, but I've settled on C for now. Am I correct?
Answered by Scott
(x + 1 - 4i)(x + 1 + 4i)

x^2 + x + 4ix + x + 1 + 4i - 4ix - 4i - (4i)^2

Answered by Mitch n' Joey
−16i^2+x^2+2x+1

But that's not one of my possible answers?
Answered by Scott
i = √-1 ... i^2 = -1
Answered by koyo
it’s c :)
Answered by X
B-6-2
A7-
B1 3/2
D
By=
C7.5
A 1
D

C
Answered by ja
x's answers to the quiz are correct
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