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## Homework Statement

If the equation 2x ^ 3 - 15X ^ 2 + 30 x - 7 = 0 has roots a, b and c to find the value of the expression a ^ 3 + b ^ 3 + c ^ 3. Also to be found without using the types Vieta,the equation with roots 1 / (a-3), 1 / (b-3), 1 / (c-3)

## Homework Equations

I found the first part of a^3+b^3+c^3=754/8 but i cant find the second part of the exercise without using the type of vieta any ideas?