Which will result in a difference of squares?

The correct option is 3.

Step-by-step explanation:

The difference of squares is defined as

In option 1,

This expression is a perfect square, therefore this is not the difference of squares. Option 1 is incorrect.

In option 2,

This expression is a perfect square, therefore this is not the difference of squares. Option 2 is incorrect.

In option 3,

This expression is the difference of squares., therefore Option 3 is correct.

In option 4,

This expression is a perfect square, therefore this is not the difference of squares. Option 4 is incorrect.

50

step-by-step explanation:

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right