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Descompuneti in factori:
a) (2x-√3)²-27
b) x²+2x+1-y²


Răspuns :

a) (2x-√3)²-27=4x²-2√3x-2√3x+3-27=4x²-4√3x-24=4(x²-√3x-6)
b) x²+2x+1-y²=x(x+2)+(1-y²)=x(x+2)+(1-y)(1+y)