30 Factoriser les expressions suivantes. 1. A(x)=7x2 – 5x 2. B(x)= 4x3 – 5x2 3. C(x)=(x + 1)(5x – 9)+(5x – 9)(2x +4) 4. D(x)=(3x – 5)² – 6x(3x –5) Merci pour vo

Bonjour,

Factoriser:

1. A(x)=7x²-5x

A(x)= x(7x-5)

2. B(x)= 4x³- 5x²

B(x)= x²(4x-5)

3. C(x)=(x + 1)(5x-9)+(5x-9)(2x +4)

C(x)= (5x-9)(x+1+2x+4)

C(x)= (5x-9)(3x+5)

4. D(x)=(3x – 5)² – 6x(3x –5)

D(x)= (3x-5)(3x-5-6x)

D(x)= (3x-5)(-3x-5)

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