i am not understanding the ex 1s second question

Let us consider the (i) (e) part of Question 2.

(i) (e)  – ab + 2 b² – 3 a² .

Here we have to identify the terms and their factors.

Terms in this expression are – ab, 2b² , – 3a² .

Now, factors of the term – ab are – 1, a and b.

Factors of the term 2b² are 2, b and b.

Factors of the term – 3a² are – 3, a  and a.

We have to represent the terms and factors of this expression by tree diagram.

So, – ab + 2ab² – 3 a²  can be represented as:

Now, let us consider the (ii) (d) part of question 2.

(ii) (d) x y + 2 x² y² 

Terms in this expression are xy and 2x²y² .

Factors of the term xy are x and y.

Factors of the term 2x²y² are 2, x, x, y and y.

Similarly, other parts of this question can be solved.