Réponses

2012-12-02T13:12:53+01:00

a.4(x²+8x+16)=2(2x²-x-3)

4x²+32x+64=4x²-2x-6

4x²+32x+64-4x²+2x+6=0

34x+70=0

34x= -70

x= -(35/17)

 

b. 4x²+4x+1=4x²-1

4x²+4x+1-4x²+1=0

4x+2=0

4x= -2

x= -1/2

 

c.4(x²+2x+1)=2(2x²-x-3)

4x²+8x+4=4x²-2x-6

4x²+8x+4-4x²+2x+6=0

10x+10=0

10x= -10

x= -1