bonjour
( x - 1 )² = x² - 2 x + 1
( x - 1 )² - 16 = ( x - 1 - 4 ) ( x - 1 + 4 ) = ( x - 5 ) ( x + 3 )
x² - 36 = ( x + 6 ) ( x - 6 )
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bonjour
( x - 1 )² = x² - 2 x + 1
( x - 1 )² - 16 = ( x - 1 - 4 ) ( x - 1 + 4 ) = ( x - 5 ) ( x + 3 )
x² - 36 = ( x + 6 ) ( x - 6 )