HELP! Polynomial question (1 Viewer)

[enigma_1]

Find roots of the equation: 4x^3-8x^2-3x+9=0 given two of the roots are equal. Let the roots be alpha, alpha and beta.

 

[obliviousninja]

use sum and products?

 

[enigma_1]

It comes out as another cubic though ..

 

[QZP]

2 unknowns, two equations. use sums and products of roots

 

[integral95]

if this was 4U maths i would use the multiplicity theorem

otherwise i would probably do a guess and check to find out one of the factor and do long division

 

[braintic]

It does come out as a cubic if you use the sum and the product.

BUT it turns out as a quadratic if you use the sum and the sum in pairs.

 

[braintic]

It is rather annoying that you never acknowledge people's help.
(I checked through all your recent questions to make sure I wasn't the only one)

Being treated as a servant does not make one feel inclined to keep helping.