Select all of the "like terms". Algebra help please?

Question

xy2

2xy

x2

-xy

2x2y

.5xy

Answer 1

2xy,-xy,2x2y,5xy are like terms

Answer 2

All except the x2.

Answer 3

All of them except for x2 have the same variables within the problem.

x and y.

it doesn't matter what the value of the x's and the y's are.  What matters is that they are there.

a variable without a number actually is the same as the number 1 in front of it.

therefore, x = 1x

-x = -1x

xy2 you have one x and two y's

2xy you have two x's and one y

x2 you have two x's

-xy you have negative 1 x's and one y

2x2y you have two x's and two y's

.5xy you have a half of an x and one y

HOPE THIS HELPS