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Sagot :

Bonjour

Développer ces 2 expressions:

1: (2y-5)(4y+2)-2y(6-y)

= 8y² + 4y - 20y - 10 - 12y + 2y²

= 8y² + 2y² + 4y - 20y - 12y - 10

= 10y² - 28y - 10

2: (3t+ √5) * 2(t+ √5)

= 6t² + 8√5t + 10

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