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Sagot :

Réponse:

les H I J déjà repondu

K= X[(-15X² - 12) + ( 105X² - 20)]

= X (-15X² - 12) + X( 105X² -20)

= ( - 15X³ - 12X) + ( 105X³ - 20X)

= - 15X³ - 12X + 105X³ - 20X

= 90X³ - 32X

L= 25 + 70y +49y²

= 25 + 7y(7y +10)

M= X²- 1

= (X + 1) + (X -1)

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