Combine like terms DO NOT PUT SPACES IN YOUR ANSWERI: \( 6-8 x y+9 x y \) THE 6 DOES NOT HAVE XY ATTACHED TO IT SO IT CAN'T BE COMBINED. NOTICE THE SUBTRACTION SIGN IN FRONT OF THE 8XY. THIS MEANS YOU WILL BE SUBTRACTING \( 9 \times Y \) AND \( 8 X Y \).

To combine like terms in the expression \( 6 - 8xy + 9xy \), first identify the like terms, which are \(-8xy\) and \(9xy\). Since you're subtracting and then adding, think of it as \( -8xy + 9xy = 1xy\) or simply \(xy\). Therefore, the simplified expression looks like this: \( 6 + xy\). So the final result, with no spaces as per your instruction, is \( 6+xy \). Remember, combining like terms not only simplifies your work but makes the equation easier to understand. Keep practicing, and soon you'll be a pro at spotting those like terms!