If the equation AX2 + BX + C = 0 (a ≠ 0), a, B and C satisfy a + B + C = 0 and A-B + C = 0, then the root of the equation is () A. 1, 0b. - 1, 0C. 1, - 1D. Cannot be determined
In this formula, if x = 1 is substituted into the equation, the left side will become a + B + C. from the known a + B + C = 0, it can be seen that when x = 1, the left and right sides of the equation are equal, that is, one root of the equation must be 1. Similarly, it can be judged that one root of the equation must be - 1. Then the root of the equation is 1, - 1