Question

Question #557a2

Answer 1

`=7a^2d+2y +y^2`

Explanation:

Count the number of terms first.
Look for like terms. Only terms that have exactly the same variables can be added.

`10a^2d+2y -3da^2 +y^2" "larr` has 4 terms

`=color(red)(10a^2d -3a^2d)+2y +y^2" "larr` variables in alphabetical order.

`=color(red)(7a^2d)+2y +y^2" "larr` like terms added