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DAU COROANA
EX 1 A
2 A SI C


DAU COROANA EX 1 A 2 A SI C class=

Răspuns :

1.a) (7x²-5x+4)+(-3x²+2x)-(9x+3)=4x²-12x+1
2.a) x²=98, x= 7√2
c) (3x+1)²-(3y-1)²= (3x+1+3y-1)(3x+1-3y+1)=3(x+y)*(3x-3y+2)