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Answered

factoriser   C(x)=12x²-8x                 Développer et réduire B(x)=(4x-1)(-3x+2) 

                  D(x)=9+27x

Réduire A(x)=3x²-(5x+2x²-8)+(3x²-7x+9)

Sagot :

C(x)=12x²-8x
     = 4x(3x-2)
D(x)=9+27x
     =9(1+3x)
B(x)=(4x-1)(-3x+2)
       = -12x²+8x+3x-2
      =-12x²+11x-2
A(x)= 3x²-(5x+2x²-8)+(3x²-7x+9)
     =3x²-5x-2x²+8+3x²-7x+9
     =4x²-12x+17

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