Difference of squares

Formula

$$a^2-b^2=(a-b)(a+b)$$

Formula Description

Example

                Example 1:|
$9a^2 - 4b^2 = (3a)^2-(2b)^2=(3a+2b)(3a-2b)$|
Example 2:|
$102^2-4 = 102^2-2^2=(102+2)(102-2)=104 \cdot 100=10400$|
Example 3:|
$102 \cdot 98 = (100+2)(100-2)=100^2-2^2 = 10000-4 = 9996$
            

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