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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?

 Apr 18, 2023
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(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.

 Apr 18, 2023

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