It takes some time for students to get familiar with variables like 𝑥 and 𝑦.

Solving lot of simple problems will make the students familiar.

The algebraic expression 𝑥 + 𝑦 cannot be simplified. But the expression 𝑥 + 𝑥 can be simplified as 2𝑥.

𝑥 + 𝑥² cannot be simplified.

But 𝑥² + 𝑥² can be simplified as 2𝑥².

Similarly, 6𝑦² - 4𝑦² can be simplified as 2𝑦².

Also, 4𝑦² - 6𝑦² can be simplified as -2𝑦².

Similar terms can be added together.

It is possible to add two or more algebraic expression.

Just like addition we can do subtraction.

But we have to properly handle the negative sign.

In algebra, to represent multiplication, we use dot sign instead of cross. It is to avoid confusion between x and x.

In multiplication, each term of the first expression is multiplied with each term of the second expression.

In basic division problems, we cancel out the common factors.