I think you meant "y = 4 arccot (x)."
This is equivalent to:
y
---- = arccot x
4
and so cot (y/4) = x
Taking logarithms, you get

Answer:
4
Step-by-step explanation
The highest degree of a quadratic equation or polynomial always determine the number of factors or zeros that such polynomial have.'
For the polynomial 2x^4+6x-5
You can see that the leading degree is 4. Hence the polynomial will have 4 roots and factors
The midpoint between the two points is (-6,4)