Answer
The required solution is $6{{x}^{3}}-{{x}^{2}}-5x+4$.
Work Step by Step
We have the given equation
$4-5x-{{x}^{2}}+6{{x}^{3}}$. The powers of x in this equation are 3, 2, 1, and 0.
Thus, the equation after writing in descending powers of x will be:
$6{{x}^{3}}-{{x}^{2}}-5x+4$.
