## Online Course Discussion Forum

### Question about online summer camp 2021 Algebra blue group problem P6

This is one of those problems where we can use the given equations to *reduce some exponents*.

Since you know that $a$ is a root of $x^4 -5x^2+3x+1$, then $a^4 - 5a^2 + 3a + 1 = 0$, that is, $a^4 = 5a^2 -3a -1$.

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