Final answer:
To find the value of k in the given expression, we need more information about x or other equations.
Step-by-step explanation:
To find the value of k in the expression 3x⁴-8x²-kx+6, we need to set up an equation using the values given in the expression. Since we don't have a specific value for x, we can solve for k in terms of x.
We don't have any information about the value of x or any other equations or conditions given in the question, so we can't determine the exact value of k without further information.