Schwartz Stuart
05/07/2023 · High School
Factorise completely each of the following polynomials: \( 1 \cdot x^{4}-2 x^{3}-21 x^{2}+x+20 \)
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The polynomial \( 1 \cdot x^{4}-2 x^{3}-21 x^{2}+x+20 \) does not have any rational roots, so it cannot be factorised using the Rational Root Theorem.
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