Question

(x+3)-(×+3)=
(4x+6)-(4x-6)=
-(7x-3)+(3-7x)=
-(x la a doua +5x-1) (x la a doua+ 5x - 1)+5x=
7x-(3x-4x)+(x-1x)
-(3x+1)+(3x-1)

Answer 1

(x+3)-(×+3)=x+3-x-3=0

(4x+6)-(4x-6)=4x+6-4x+6=12

-(7x-3)+(3-7x)=-7x+3+3-7x=6-14x

-(x²+5x-1) (x²+ 5x - 1)+5x=nu știu

7x-(3x-4x)+(x-1x)=7x-3x+4x+x-x=8x

-(3x+1)+(3x-1)=-3x-1+3x-1=-2

Sper că te-am ajutat însă nu știu la a 4-a