3x2 - 27 (Factor two times)

What are “like terms”? why can we only add like terms?

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Which of the following constants can be added to x2 - 3x to form a perfect square trinomial?