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?
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?
Answers
Answered by
Scott
(x + 1 - 4i)(x + 1 + 4i)
x^2 + x + 4ix + x + 1 + 4i - 4ix - 4i - (4i)^2
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?
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
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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