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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Let . Then
Replace x in the equation:
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