Réponse :
Explications étape par étape
Bonjour
Factoriser : -3y -40 +1y au carré
= y^2 - 3y - 40
= y^2 - 2 * y * 3/2 + (3/2)^2 - (3/2)^2 - 40
= (y - 3/2)^2 - 9/4 - 160/4
= (y - 3/2)^2 - 169/4
= (y - 3/2)^2 - (13/2)^2
= (y - 3/2 - 13/2)(y - 3/2 + 13/2)
= (y - 16/2)(y + 10/2)
= (y - 8)(y + 5)
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Réponse :
Explications étape par étape
Bonjour
Factoriser : -3y -40 +1y au carré
= y^2 - 3y - 40
= y^2 - 2 * y * 3/2 + (3/2)^2 - (3/2)^2 - 40
= (y - 3/2)^2 - 9/4 - 160/4
= (y - 3/2)^2 - 169/4
= (y - 3/2)^2 - (13/2)^2
= (y - 3/2 - 13/2)(y - 3/2 + 13/2)
= (y - 16/2)(y + 10/2)
= (y - 8)(y + 5)