Answer: No, Lena is not correct.
Step-by-step explanation:
When you have like terms, they must be the exact same except for the coefficient.
For example, -5x²y³ and 45x²y³ are like terms because everything is the same except for the coefficient.
However, something like 23x²y² and 10x³y are not, because the variables aren't raised to the same power.
