Find Each Sum.

(-4c2 + 7cd + 8d) + (-3d + 8c2 + 4cd) =

To add monomials, you have to look at the variables that are accompanied by their coefficients. In the given problem, (-4c2 + 7cd + 8d) + (-3d + 8c2 + 4cd), you can combine both cd ut nt cd and c² and cd and d and d and c² because they have different variables.

(-4c2 + 7cd + 8d) + (-3d + 8c2 + 4cd)

(-4c ² + 8c²) + (7cd + 4cd) + (8d - 3d)

4c² + 11cd + 5d