If there is no x ^ 2 term in the square plus x plus K ^ 2x ^ 2-5 of the polynomial 3x to the third power-4x, then the value of K is

If there is no x ^ 2 term in the square plus x plus K ^ 2x ^ 2-5 of the polynomial 3x to the third power-4x, then the value of K is

The solution consists of the cubic power of 3x - the square of 4x plus x plus K ^ 2x ^ 2-5, without x ^ 2 term
That is K-4 = 0
That is k = 4