Question

Finding the sum of $\cos\frac{\pi}{7}$, $\cos\frac{3\pi}{7}$, $\cos\frac{5π}{7}$ by first finding a polynomial with those roots

score 299 · Answer 1 · 2018-05-24 11:15:30

299

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Finding the sum of $\cos\frac{\pi}{7}$, $\cos\frac{3\pi}{7}$, $\cos\frac{5π}{7}$ by first finding a polynomial with those roots

Published on 24 May 2018 - 11:15

score 148 · Answer 2 · 2026-03-30 13:53:48

148

Views

Zeros of a polynomial under small perturbation

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score 66 · Answer 3 · 2026-03-30 23:11:34

66

Views

A naive question on values of an integral polynomial

Published on 30 Mar 2026 - 23:11

score 72 · Answer 4 · 2026-03-25 07:43:21

72

Views

Factoring a polynomial in short and simple way.

Published on 25 Mar 2026 - 7:43

score 98 · Answer 5 · 2026-03-25 13:53:22

98

Views

How to factorize bi-quadratic

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score 4.8k · Answer 6 · 2026-03-30 13:59:12

4.8k

Views

What is the necessary and sufficient conditions for a quadratic equation to have one positive root?

Published on 30 Mar 2026 - 13:59

score 58 · Answer 7 · 2026-03-25 04:36:23

58

Views

How do you find polynomial function of the image below using Lagrange interpolation?

Published on 25 Mar 2026 - 4:36

score 387 · Answer 8 · 2026-03-25 09:40:02

387

Views

how to find the coordinates of the tangent at 45 degrees of a polynomial function

Published on 25 Mar 2026 - 9:40

score 55 · Answer 9 · 2026-03-28 12:34:08

55

Views

How to open $[1 + \langle x,y\rangle]^2$

Published on 28 Mar 2026 - 12:34

score 34 · Answer 10 · 2026-03-29 22:28:30

34

Views

Show that $\lim_{z\to\infty}|\sum_{k=1}^n p_k(z)e^{\lambda_k z}|=0$ iff $\Re(\lambda_k)<0$

Published on 29 Mar 2026 - 22:28

score 97 · Answer 11 · 2018-05-26 18:18:44

97

Views

Question about polynomial multiplication

Published on 26 May 2018 - 18:18

score 44 · Answer 12 · 2018-05-26 20:20:16

44

Views

Difference between $p(x)$ and $p(x+2)$

Published on 26 May 2018 - 20:20

score 51 · Answer 13 · 2018-05-27 06:59:42

51

Views

Necessary condition for a special polynomial of degree $5$ to have a special quadratic factor

Published on 27 May 2018 - 6:59

score 1.6k · Answer 14 · 2018-05-27 15:50:22

1.6k

Views

$f$ admits multiple roots iff $\mathrm{gcd}(f,f')\neq 1_F$

Published on 27 May 2018 - 15:50

score 266 · Answer 15 · 2026-03-25 21:01:19

266

Views

To what extend does shared roots imply divisibility of polynomials?

Published on 25 Mar 2026 - 21:01

List Question

Finding the sum of $\cos\frac{\pi}{7}$, $\cos\frac{3\pi}{7}$, $\cos\frac{5π}{7}$ by first finding a polynomial with those roots

Zeros of a polynomial under small perturbation

A naive question on values of an integral polynomial

Factoring a polynomial in short and simple way.

How to factorize bi-quadratic

What is the necessary and sufficient conditions for a quadratic equation to have one positive root?

How do you find polynomial function of the image below using Lagrange interpolation?

how to find the coordinates of the tangent at 45 degrees of a polynomial function

How to open $[1 + \langle x,y\rangle]^2$

Show that $\lim_{z\to\infty}|\sum_{k=1}^n p_k(z)e^{\lambda_k z}|=0$ iff $\Re(\lambda_k)<0$

Question about polynomial multiplication

Difference between $p(x)$ and $p(x+2)$

Necessary condition for a special polynomial of degree $5$ to have a special quadratic factor

$f$ admits multiple roots iff $\mathrm{gcd}(f,f')\neq 1_F$

To what extend does shared roots imply divisibility of polynomials?

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