Can anybody explain how I can get the equation.

Step-by-step explanation:

If the polynomial is rational, then one of zeros is 3 + 2i.

We are also given f(x) is decreasing function, it means the leading coefficient is negative.

The factors would be:

or

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,

x = 3 ± √(5+y)