1) You need to remember what is the form of reciprocal equation if the polynomial is of fourth order:
`ax^4 + bx^3 + cx^2 + bx + a = 0`
Notice that the free term needs to be equal to the coefficient of `x^4` , hence `k - 3` needs to be equal to 2 such that:
`k-3 = 2 =gt k = 2+3 =gt k = 5`
Notice that the coefficient of `x^3` needs to be equal to the coefficient of x, hence `h - 2` needs to be equal to 1 such that:
`h - 2 = 1 =gt h = 3`
Hence, for `k = 5 ` and `h = 3` , the reciprocal equation is `2x^4 + x^3 - 5x^2 + x + 2 = 0.`
2) You need to remember that a biquadratic equation does no have odd powers, hence the given equation can not be a biquadratic, because it contains the term x.