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Sagot :

VINS

bonsoir

( 5 x + 2 ) ( x - 3 ) =  5 x² - 15 x + 2 x - 6  

=  5 x² - 13 x - 6

pour  x = - 2

=  20 + 26 - 6

= 40

2 ( x+ 5 ) ( x + 1 )

=  ( 2 x + 10 ) ( x + 1 )

= 2 x² + 2 x  + 10 x + 10

= 2 x² + 12 x + 10

la 3 , tu prends ta calculatrice

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