Question

which of the following pairs is not like terms
1)3x,-4x
2)x²y,5x²y
3)7xy,13xy
4)3x²y,7xy²​

Answer 1

Answer:

4) 3x²y,7xy²

Step-by-step explanation:

We check all,

For like algebraic terms, the exponents of all the variables should be same.

in 1)

power of variable in 3x and 4x is the same {1}.

in 2)

power of variables and 5x²y are the same {2,1}.

in 3)

power of variables in 7xy and 13xy are the same {1,1}.

What is left is 4). So, this should be the answer. But still,

power of variables in 3x²y and 7xy² are not the same {2,1} & {1,2}.

So, the answer is 4) 3x²y,7xy²