a) Expand the product \((x-1)(x-2)(x-3)\). b) The "cubic" \(x^3+2x^2-11x-12\) has three roots. What is their sum?
(a) The product expands to x^3 - 8x^2 + 10x - 6.
(b) The roots are -4.6881, -1.1431, and 2.8111. Their sum is -3.
