Mathématiques

Question

simplifier :

(x²+7x-3)-(3x-5x²-6)

3y²-(3y-9)-(2y²-4y-5)

2 Réponse

  • (x²+7x-3)-(3x-5x²-6=

    = x^2+5x^2+7x-3x-3+6

    =6x^2+4x+3

     

    3y²-(3y-9)-(2y²-4y-5)

    =3y^2-2y^2-3y+4y+9+5

    = y^2+y+14

     

    VOila, bon courage.

  • 1) (x^2+7x-3)-(3x-5x^2-6) = x^2+7x-3-3x+5x^2+6 = 6x^2+4x+3 2) 3y^2-(3y-9)-(2y^2-4y-5) =3y^2-3y+9-2y^2+4y+5 =y^2+y+14

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