Complex Roots of Polynomials

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We use the quadratic formula to find all complex roots of polynomials. This is Chapter 3, Problem 8 of Math 1141 Algebra notes. Presented by Thanom Shaw of the School of Mathematics and Statistics, UNSW.
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7 years later and this video still helps so much

andrewhl
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Beautiful teacher help me feel in love on both math and teacher.

NORTHEASTGAMING-ergo
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Can you help me solve this kind of complex equation: x^4+sqr2*x^2+1=0. Thank you

duygurechani
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Thank you for the lesson very instructive

KarelDjoni-gf
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ma'am what about 4 terms? can i still use quadratic formula?

rexd
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@MathsStatsUNSW I believe that a mistake has been made. The difference of two squares in real numbers is (a-b)(a+b) = a^2 - b^2, but in the complex plane, (a-bi)(a+bi) = a^2 + b^2 due to the presence of i.

abdulrahmantaher
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Lol... everyone keeps using quadratic formula. I need to know more than that!

kyrilcouda
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your method has not convince me in second question.

riakmacholariakkeer