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Zalina67
@Zalina67
April 2019
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Faire ce calcul en détaillant :
A = -(y - 5) + 5y (y -3 ) + (2y + 5) (y - 4)
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anylor
-(y - 5) = - y + 5
5y (y -3 ) = 5y * y - 3 *5y = 5y² - 15 y
(2y + 5) (y - 4) = (2y * y) -(2 y *-4) +(5*y) + (5* -4)= 2y²-3y-20
=> A = 7y² -19y-15
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5y (y -3 ) = 5y * y - 3 *5y = 5y² - 15 y
(2y + 5) (y - 4) = (2y * y) -(2 y *-4) +(5*y) + (5* -4)= 2y²-3y-20
=> A = 7y² -19y-15