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= 3(x^2 - 4x + 2) - 7
= 3x^2 - 12x + 6 - 7
= 3x^2 - 12x - 1
b. (f o g)(x) = f(g(x)) = f(3x - 7)
= (3x - 7)^2 - 4(3x - 7) + 2
= 9x^2 - 42x + 49 - 12x + 28 + 2
= 9x^2 - 54x + 79
c. (g o f)(10) = 3(10)^2 - 12(10) - 1 = 300 - 120 - 1 = 179
d. (f o g)(5) = 9(5)^2 - 54(5) + 79 = 225 - 270 + 79 = 34