Math Problem?????????

Question

what is 2a^2 - 1a^2? (2a squared minus 1a squared)

Answer 1

a^2(2-1) = 1a^2

Answer 2

1a^2

since the a^2 are the same, it's just like saying 2 apples - 1 apple = 1 apple.  If the variables or exponents were different, then it would be like 2 apples - 1 orange (which you can't do)

Answer 3

1a^2

2 of something minus one of the same thing is 1

Answer 4

one a squared 1a^2

Answer 5

Two of something, minus 1 of something is...

Answer:

1a²

or simply,

a²