Question 193425
-Find All Roots.
x^3-13x^2+56x-78 
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The only real root is 3.
Divide by (x-3) -->
x^2 - 10x + 26 = 0
Use the quadratic eqn to find the other 2 zeroes.
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*[invoke solve_quadratic_equation 1,-10,26]
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x = 5+i
x = 5-i