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(5+x)(5-x)=
(3x-1)2 – (3x – 1)(3x+1)=​


Răspuns :

Răspuns:

Explicație pas cu pas:

Vezi imaginea LAURA

Răspuns:

(5+x)(5-x)= 5²-x²= 25-x²

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