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URGENTTTTTTTT Coroniță! !!

(1-2x )^2-7×(1-2x ) =.....??


Răspuns :

(1-2x )^2-7×(1-2x ) =
1 - 4x + 4x
² - 7 + 14x =
10x + 4x² - 6 

daca sa descompui in factori ireductibili :
= (1-2x) (1 - 2x - 7) =
   (1 - 2x) ( -2x - 6) 
[tex](1-2x)^{2}-7*(1-2x)=[/tex]

[tex]=(1-2x)(1-2x)-(1-2x)*7=[/tex]

[tex]Dam~factor~pe~(1-2x).[/tex]

[tex]=(1-2x)[(1-2x)-7]=[/tex]

[tex]=(1-2x)(1-2x-7)=[/tex]

[tex]=(1-2x)(-2x-6)=[/tex]

[tex]=(1-2x)[-2*(x+3)]=[/tex]

[tex]=-2(1-2x)(x+3)[/tex]