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The equation is .
Consider .
Rational zeros method:
Rational Root Theorem, if a rational number in simplest form is a root of the polynomial equation , then is a factor of and is a factor if .
If is a rational zero, then is a factor of and is a factor of .
The possible values of are .
The possible values for are .
So, .
, is not a zero of .
Consider .
Using synthetic division:
Since , is a zero of .
is a factor of .
The depressed polynomial is .
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Consider .
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The real solutions of are .
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