Question 30072
(5x^6 - 6x^5 - 9x^4 - 2) - (7x^6 + 4x^5 - 3x^4 - 3)
yes, group like terms
first do the subtraction
(5x^6 - 6x^5 - 9x^4 - 2) - 7x^6 - 4x^5 + 3x^4 + 3
now group like terms
(5x^6 - 7x^6) + (-6x^5 - 4x^5) + (-9x^4 +3x^4) + (-2 + 3)
now combine terms
-2x^6 -10x^5 - 6x^4 +1