Bonjour,
Développer:
(-2+5y) x (3y-8) - (4y+7) x (2y+9)= -6y+15y²+16-40y-(8y²+14y+36y+63)
= 15y²-46y+16-8y²-50y-63= 7y²-96y-47
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Bonjour,
Développer:
(-2+5y) x (3y-8) - (4y+7) x (2y+9)= -6y+15y²+16-40y-(8y²+14y+36y+63)
= 15y²-46y+16-8y²-50y-63= 7y²-96y-47