To find where f'(x) = 2(5x - 2) is equal to 0, we check where 5x 2 is equal to 0.5x ? 2 = 0 x =Because f'(x) exists for all values of x, you can conclude that this is the only critical number.Thus, the critical number of f(x) is as follows. (Enter your answers as a comma-separated list.)X =