FARAHEZAT0
Answered

bonjour j ai besoin d aide pour developper ses expressions
(2x+1) (x+4)
(5x+6) (2x+3)
(7x+5) (8+9x)
(x+1/3) (x+2)
merci d avance

Sagot :

THOMAS756

Bonjour,

(2x + 1)(x + 4) = 2x * x + 2x * 4 + 1 * x + 1 * 4 = 2x² + 8x + x + 4 = 2x² + 9x + 4

(5x + 6)(2x + 3) = 10x² + 15x + 12x + 18 = 10x² + 27x + 18

(7x + 5)(8 + 9x) = 56x + 63x² + 40 + 45x = 63x² + 101x + 40

(x + 1/3)(x + 2) = x² + 2x + 1/3 x + 2/3 = x² + (6/3 + 1/3)x + 2/3 = x² + 7/3 x + 2/3

Bonne journée,

Thomas

INEQUATION

Bonjour,

Développer ses expressions:

(2x+1) (x+4)= 2x²+x+8x+4= 2x²+9x+4

(5x+6) (2x+3)= 10x²+12x+15x+18= 10x²+27x+18

(7x+5) (8+9x)= 56x+40+63x²+45x= 63x²+101x+40

(x+1/3) (x+2)= x²+x/3+2x+2/3= x²+(x+2x*3)/3+2/3= x²+7x/3+2/3