Subtract. Express your answer as a polynomial in standard form. (6x^3-7x^2+9x+4)-(5x^2-9x+9)
6x^3 - 7x^2 + 9x + 4 - 5x^2 + 9x - 9
= 6x^3 - 7x^2 + 9x + 4 - 5x^2 + 9x - 9
= 6x^3 - 12x^2 + 18x - 5
Therefore, the answer is 6x^3 - 12x^2 + 18x - 5.
= 6x^3 - 7x^2 + 9x + 4 - 5x^2 + 9x - 9
= 6x^3 - 12x^2 + 18x - 5
Therefore, the answer is 6x^3 - 12x^2 + 18x - 5.