Can the three solutions of cubic equation in college entrance examination mathematics be boldly said to be integers?
Solution: (1) If the equation has an integer solution and can only be a factor of 7, then the integer solution of the equation can only be four numbers: 1,-1, 7 and-7; (2) The equation has an integer solution. The integer solution of the equation can only be a factor of 3, namely 1,-1, 3 and -3. Substitute them into the equation x 3 -2x 2-4x+3=0 for verification, where x=3 is the integer solution of the equation.