algebra precalculus - Solve the equation $x^4-2x^3-21x^2+22x+40=0$ whose roots are in A.P. - Mathematics Stack Exchange

Solve the equation $x^4-2x^3-21x^2+22x+40=0$ whose roots are in A.P. (arithmetic progression). I don't understand this solution. Why are the terms of AP considered as mentioned in the question and

What are the roots of x ⁴ + 2 x ³ - 21 x²- 22x + 40 = 0? - Quora

PDF) second edition second edition

Precalculus, 2nd Edition

Precalculus With Trigonometry, PDF, Trigonometric Functions

Solve the equation whose roots are in A.P., Theory of Equations

6. Solve the following equations, given that the roots of each are in H.P. () 6.-11x2 +6x - 1 = 0 () 15x - 23x2 +92-1 = 0 27 Solve the following auntiam

Inter 2nd Year Maths 2A Theory of Equations Important Questions – AP Board Solutions

What are the roots of x ⁴ + 2 x ³ - 21 x²- 22x + 40 = 0? - Quora

Solve the equation whose roots are in A.P., Theory of Equations