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Urgent,va rog!
1.Descompuneti in factori : 25(2x+3)²- 36(2x-1)²=
2.Descompuneti in factori ireductibili : x²+x-2=


Răspuns :

1. 25(2x+3)²- 36(2x-1)²=[5(2x+3)- 6(2x-1)][5(2x+3)+6(2x-1)]=
=(10x+15- 12x+6)(10x+15+12x-6)=(-2x+21)(22x+9)

2. x²+x-2= x²-x+2x-2=x(x-1)+2(x-1)=(x-1)(x+2)