What is the product of all roots of equation x ^ 2-3x-6 = 0 and equation x ^ 2-6x-3 = 0?

What is the product of all roots of equation x ^ 2-3x-6 = 0 and equation x ^ 2-6x-3 = 0?

Let X1 and X2 be the two roots of the equation AX + BX + C = 0 (a ≠ 0), then X1 + x2 = - B / A, X1 * x2 = C / A. let X3 and X4 be the two roots of the equation x-3x-6 = 0, then X3 * X4 = - 6, let X5 and X6 be the two roots of the equation x-6x-3 = 0, then X5 * X6 = - 3, so X3 * X4 * X5 * X6 = (- 6) * - 3) = 18

When does the equation of X - 4 + AX = 3x + B have a unique solution,

When a is not equal to 3 and B is equal to - 4, there is a unique solution, which is 0
When a is not equal to 3 and B is not equal to - 4, there is a unique solution. The solution is (B + 4) / (A-3). If the values of a and B are fixed, then the solution is also unique
When a is equal to 3 and B is not equal to - 4, there is no solution,
When a equals 3 and B equals - 4, there are innumerable solutions

When a is a value, the equation 3x = ax + 5 about X has no solution, and the value of a is obtained

3x=ax+5
When a = 3, 0 = 5 has no solution