Question

Find the sum.

12x^2 + 9x^2 =

Answer 1

when the variables and exponents are same of two terms then you can add their coefficients

Answer 2

here is an example
3y+7y +4y are like terms same variables and same degree
so just add their coefficients (3+4+7)y = 14y

Answer 3

and the exponents? It would be 4 then?

Answer 4

no exponents would stay de same
just add coefficients

Answer 5

21x^2?

Answer 6

@Haksorin As I said in another post: The variable (and its exponents) stays the same during addition.

Answer 7

when we `mulitply` same bases then we should add their exponents and multiply the coefficients

Answer 8

ye that's correct :=)) o^_^o