Hi

How do I do this question:

The equation 3x^3 + 6x^2 - 4x + 7 = 0 has roots a,b,c. Fnd the equation with roots a + b, a + c, b+ c.

I can do simple ones e.g. roots 1/a, 1/b, 1/c but I failed at this one :(

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- Aug 12th 2009, 06:34 AMxwrathbringerxForming Equations Using Roots
Hi

How do I do this question:

The equation 3x^3 + 6x^2 - 4x + 7 = 0 has roots a,b,c. Fnd the equation with roots a + b, a + c, b+ c.

I can do simple ones e.g. roots 1/a, 1/b, 1/c but I failed at this one :( - Aug 12th 2009, 07:29 AMred_dog
Let . Then

Let

Replace x in the equation: