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Sagot :

VINS

bonsoir

x

x + 5

( x + 5 )²

( x + 5 )² - x²

= x² + 10 x + 25 - x²

=  10 x + 25

si on choisit  2 =  10 *2 + 25 = 45

si on choisit  - 8 = 10 * - 8 + 25 = - 80 + 25 =  - 55

10 x + 25 = 5 ( 2 x + 5 )  donc multiple de 5

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