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For the cubic polynomial, 6x^3+6x^2-12x+3=0, where a, b and c represent the roots, find (a) a+b+c (b) 1/a+1/b+1/c (c) a^2+b^2+c^2 (d) a^3+b^3+c^3

Theres also a nice way to solve tan 15 without using compound angle if anyones interested from the diagram, tan15=1/root3+2 btw insert-username not to be piccy, but do u mean differentiate? if so, it shoudl be f(x) imo since h isnt anywhere in the equation. ALso, some of the equations to...