Răspunsuri

2014-05-25T01:51:30+03:00
A)4x²-4x+1+x²-1= 3x²-4x= x(3x-4)

b)x³-x²-4x+4= x²(x-1)-4(x-1)=(x-1)(x²-4) =(x-1)(x+2)(x-2)

c)3x-1=7x+11
3x-7x=11+1
-4x=12
x= -3
2 4 2