Given the cubic power of the polynomial ax + BX + 4, when x = 2, the value is 8, and when x = - 2, what is the value?

Given the cubic power of the polynomial ax + BX + 4, when x = 2, the value is 8, and when x = - 2, what is the value?




When x = 2, the value of the polynomial AX3 + bx-3 is 15, then when x = - 2, its value is 15______ .





If the factorization result of the polynomial x2 + ax + B is (x + 1) (X-2), then the value of a + B is______ .


(x + 1) (X-2) = x2-2x + X-2 = x2-x-2, so a = - 1, B = - 2, then a + B = - 3