A TOUS LES PROS DES MATHS :p : *Devellope et reduis les expressions suivantes : A= 3( x +1)( x -5) B=2(-3- t )( t -7) C= -( y +5)(3 y -6) D= x (2 x -5)(2- x ) m

[tex]A = 3(x+1)(x-5) = 3x^2-12x-15[/tex]

[tex]B = 2(-3-t)(t-7) = -2t^2+8t+42[/tex]

[tex]C = -(y+5)(3y-6) = -3y^2-9y+30[/tex]

[tex]D = x(2x-5)(2-x) = -2x^3+9x^2-10x[/tex]

En espérant t'avoir aidé.

A = (3x+3((x-5)

A = 3x²+15x+3x-15

A = 3x² +18x -15

b = (-6t-2t)(t-7)

B = -6t²+42t-2t+42t

b = -6t²+82t

C = -3y²-15y+6y-30

c = -3y²19y-30

D = 2x²-5x(2-x)

= 4x²-2x^3 -10x +5x²

= 2x^3 +9x² -10x