need help to solve all parts, please see attached

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Find functions f and g such that h = go f. 1 h(x) = x4 - 9 {g(x), f(x) } = Find and simplify f(a + h) - f(a) (h # 0) h for the following function. f(x) = 8x2 - 12x + 1 8x- - 12x + 1 X Check which variable(s) should be in your answer. Find and simplify the following for the function. (Assume h = 0.) f( x) = 9Vx f(a + h) - f(a) X vath h X