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= 3(x² - 4x + 2) - 7
= 3x² - 12x + 6 - 7
= 3x² -12x - 1
c. (gof)(5) = 3(5)² - 12(5) - 1
= 3(25) - 60 - 1
= 75 - 61
= 14
b. (fog)(x) = (g(x))² - 4(g(x) + 2
= (3x - 7)² - 4(3x - 7) + 2
= 9x² -42x + 49 -12x + 28 + 2
= 9x² - 54x + 79
d. (fog)(10) = 9(10)² - 45(10) + 79
= 9(100) - 450 + 79
= 900 - 371
= 529