## Algebra: A Combined Approach (4th Edition)

$(x-5)(4x^2 + 1)$
$4x^3+x-20x^2-5$ $= x(4x^2+1) - 5 (4x^2 + 1)$ Factor out the common factor, $(4x^2 + 1)$. $= (x-5)(4x^2 + 1)$