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Scoate factorul comun:
(3x-5)(x+1)+(5-3x)(2x+1)-(3x-5)(x-3)=


Răspuns :

(3x-5)(x+1)+(5-3x)(2x+1)-(3x-5)(x-3)=
(3x-5)(x+1)-(3x-5)(2x+1)-(3x-5)(x-3)=
(3x-5)(x+1-2x-1-x-3) =(3x-5)(-3-2x)
3x°2-5+10x°2-3x-3x°2-15=-20+10x°2-3x Sa stii ca °2 inseamna la puterea 2!!!