Thank you for the opportunity to help you with your question!
a) At least one of the two numbers must be zero to obtain 0 as the product.
from here, x=3 or 1
x=0, 1 or 3 hence cubic equation
in the second question; what is different other then the solution?
in the second equation x is raised to power 3 while in the first x is raised to power 2
thank you so much
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