Question
Form a polynomial f(x) with real coefficients having the given degree and zeros
21) Degree: 4, zeroes: 2i and -3i
22) Degree: 3, Zeroes i and -10
21) Degree: 4, zeroes: 2i and -3i
22) Degree: 3, Zeroes i and -10
Answers
for every a+bi there is a a-bi solution
(x-2i)(x+2i)(x-3i)(x+3i) = 0
(x^2 +4)(x^2+9) = 0
x^4 + 13 x^2 + 36 = 0
=================
(x-i)(x+i)(x+10) = 0 etc
(x-2i)(x+2i)(x-3i)(x+3i) = 0
(x^2 +4)(x^2+9) = 0
x^4 + 13 x^2 + 36 = 0
=================
(x-i)(x+i)(x+10) = 0 etc
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