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Aprofundare:2x^2+x-1;2x^2-x-3;2x^2-5x+2

Răspuns :

Renatemambouko
2x^2+x-1=2x^2+2x-x-1=2x(x+1)-(x+1)=(x+1)(2x-1)

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

2x^2-5x+2=2x^2-4x-x+2=2x(x-2)-(x-2)=(x-2)(2x-1)




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