Type 7:

Basic method :

Shortcut method:

Step 1: Consider the middle term

Step 2: Split the term into 4 and

Step 3: Divide 4 and by the first term 2.

The roots of the given equation are

Step 1: Consider the middle term

Step 2: Split the term into 18 and

Step 3: Divide 18 and by the first term 10

The roots of the given equation are

The final answer is