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myalee1419
16.07.2019 •
Mathematics
Find all zeros of f(x)= x^3-4x^2-5x+20
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Ответ:
Use synthetic division. For example, if I chose 4 as a possible root, the synthetic division setup would be
4 / 1 -4 -5 20
4 0 -20
1 0 -5 0
This tells us that 4 is a root (I was just lucky) and (x-4) is a factor.
The quotient (remaining factor) is (x^2 - 5), which, if factored, yields
x = sqrt(5) and x = -sqrt(5)
In summary, the roots (or zeros) of f(x)= x^3-4x^2-5x+20 are
{sqrt(5), -sqrt(5), 4}
Ответ:
demand is 50 piizas
the demand is greater than the supply
the customer will probably be willing to pay more for the same amount of pizzas