Final answer:
The roots of the quadratic equation (x+6)(x-3)=0 are -6 and 3.
Step-by-step explanation:
To find the roots of the quadratic equation (x+6)(x-3)=0, we set each factor equal to zero and solve for x. So we have two equations: x + 6 = 0 and x - 3 = 0.
Solving these equations, we find that x = -6 and x = 3.
Thus, the roots of the quadratic equation are -6 and 3.