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Descompuneti in factori
a) 8x^3-2x
b)x^4+64


Răspuns :

8x³-2x=2x(4x²-1)=2x(2x-1)(2x+1)
x^4-64=(x²-8)(x²+8)=(x-2√2)(2+2√2)(x²+8)