Question

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Answer 1

Answer:

4) Like terms: $8x^{2}$ and $x^{2}$ Unlike terms: $-9x^{2} y$

6) Not possible since there are no like terms.

8) Trinomial

Explanation:

4) Like terms are terms that have the same variables with the same powers.

1. eg: xy and x won't be like terms since y is not there in the 2nd one.
2. eg: $x^{2}$ and $x^{3}$ are unlike terms since the powers are different.

However, they're not dependent on the coefficients, i.e., the numbers near the variables (not powers).

8) Trinomial since there are 3 terms