developper C= (x+3) (2x+5) merci

Bonsoir,

(x+3) (2x+5)

x*2x = 2x²

x*5 = 5x

3*2x = 6x

3*5 =15

=> 2x² +5x +6x +15 = 2x² +11x +15

Bonsoir

Développer:

C = (x + 3) (2x + 5)

C = 2x² + 5x + 6x + 15

C = 2x² + 11x + 15.