How do you find the nth term of a quadratic sequence

Step 1: Confirm if the sequence is quadratic. This is done by finding the second difference.

Step 2: If you divide the second difference by 2, you will get the value of a.

1

²

Step 3: Next, substitute the number

Step 4: Now, take these values from the numbers in the original number sequence and work out the nth term of these numbers that form a linear sequence.

Step 5: Write down your final answer in the form an² + bn + c.