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Descompuneti in factori expresia E(x)=x²-4x-12

dau coroana !!!!!​

Răspuns :

 

[tex]\displaystyle\bf\\E(x)=x^2-4x-12\\\\~~~~~~-4x=2x-6x\\\\E(x)=x^2+2x-6x-12\\\\E(x)=x(x+2)-6(x+2)\\\\\boxed{\bf E(x)=(x+2)(x-6)}[/tex]

 

 

 

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