- #1

- 2

- 0

8x^3+4cx^2+2(b-3)x+(a-2c)=0

a, b, c are real number.

if p, q , t be roots.

What can say about (p+q-2t) and (p^2+ q^2-2t^2)???

Please help me??

Thanks so much.

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- Thread starter mahtaban
- Start date

- #1

- 2

- 0

8x^3+4cx^2+2(b-3)x+(a-2c)=0

a, b, c are real number.

if p, q , t be roots.

What can say about (p+q-2t) and (p^2+ q^2-2t^2)???

Please help me??

Thanks so much.

- #2

Deveno

Science Advisor

- 906

- 6

hint: write your polynomial as 8(x-p)(x-q)(x-t) and multiply it out, then compare coefficients.

- #3

- 2

- 0

p+q+t=c/2

pq+pt+qt=(b-3)/4

pqt=(2c-a)/8

but I need value for

(p+q-2t)??

(p^2+ q^2-2t^2)???

Please help me??

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