What is the second derivative of

What is the second derivative of G(x) = 3(2-x2)^3
and Given that F''(x) = 2√x-1, find the third derivative of F?

What is the second derivative of G(x) = 3(2-x2)^3
Did you mean x^2 ( x squared?)
G(x) = 3(2-x^2)^3
G'(x) = 3 (3)(2-x^2)^2 (-2x)
G'(x) = -18x(2-x^2)^2

Apply the product rule for G''(x)
G''(x) = -18(2-x^2)^2 -18x (2)(2-x^2) (-2x)
G''(x) = -18(2-x^2)^2 +72x^2(2-x^2)

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F''(x) = 2(x-1)^(1/2)
F'''(x) = 2(1/2) (x-1)^(1/2-1)
F'''(x) = (x-1)^(-1/2)
F'''(x) = 1/√(x-1)

second derivative of G(x) = 3(2-x2)^3 : http://www.wolframalpha.com/input/?i=3%282-x2%29%5E3+second+derivative

F''(x) = 2√x-1, find the third derivative of F? : http://www.wolframalpha.com/input/?i=2%E2%88%9Ax-1+derivative

On F, Im not sure if that was SQRT(x-1) or SQRT(x) - 1, if its the first one, just put parenthesis in the txt box