This is my final test for this unit someone please help me...
2 answers:
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To find the factor a a polynomial from its roots, we are going to seat each one of the roots equal to
, and then we are going to factor backwards.
We know for our problem that one of the roots of our polynomial is -3, so lets set -3 equal to and factor backwards:
is a factor of our polynomial.
We also know that another root of our polynomial is
, so lets set equal to and factor backwards:
(
is a factor of our polynomial.
We can conclude that there is no correct answer in your given choices.
We know for our problem that one of the roots of our polynomial is -3, so lets set -3 equal to
We also know that another root of our polynomial is
(
We can conclude that there is no correct answer in your given choices.
If n is rational, it means that
Therefore when we do n² we can write it as
Remember that the product of two integer numbers is also an integer, therefore we can guarantee that
Then we can confirm that n² is the quotient of two integers and the denominator is not zero, therefore, n² is always rational, it cannot be an irrational number