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Sagot :

Bonjour,

(4y+2)(4y+2)+3y(5y-9)

= 16y²  +8y + 8y +4 + 15y² - 27y

= 31y²  -11y +4

Bonjour,

Développer :

= (4y+2)(4y+2)+3y(5y-9)

= (4y+2)²+3y(5y-9)

= (4y+2)²+15y²-27y

= 16y²+16y+4+15y²-27y

= 31y²+16y+4-27y

= 31y²-11y+4

Bonne journée.

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