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Sagot :

NBA10

Réponse :

bonjour,

M = x² - 49

= x² - 7²

= ( x + 7 )( x - 7 )

N = 81 - t²

= 9² - t²

( 9 + t ) ( 9 -t )

P = 16x² - 36

= (4x)² - 6²

= ( 4x + 6 ) ( 4x - 6 )

Q = 25 - 4y²

= 5² - (2y)²

= ( 5 - 2y ) ( 5 + 2y )

voila:)

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