Use the short computational formula ( a - b )( a + b )

Exercise the following short computational formula

( 12 - 4 ) ( 12 + 4 ) =

Fill in the blank boxes using the following short computational formulas so that it corresponds a box to each term .

The purpose of this exercise is to learn about short computational formulas and the results are not important.

Exemple !

( a + b ) 2 = a 2 + 2ab + b 2

( a - b ) 2 = a 2 - 2ab + b 2

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

( a + b + c ) 2 = a 2 + b 2 + c 2 + 2ab + 2bc + 2ca

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