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3)Descompuneti in factori:
a)[tex] 3x^{2} y-24xy+48y;[/tex]
b)[tex] 18ax^{2} +24ax+8a[/tex]
c)[tex]49 x^{2}y^{2} + 14y^{2} x+ y^{2} [/tex]


Răspuns :

a)  3x²y-24xy+48y=3y(x²-8x+16)=3y(x-4)²

b) 18ax²+24ax+8a=2a(9x²+12x+4)=2a(3x+2)²

c) 49x²y²+14y²x+y²=y²(49x²+14x+1)=y²(7x+1)²