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1.x²-4x+4-5²=
2.x²+4x+3=
3.x²-2x-4=
4.9x²+6x-35=​


Răspuns :

1.x²-4x+4-5²=  x²-4x+4-25=x²-4x-21

2.x²+4x+3= x²+4x+3

3.x²-2x-4= x²-2x-4

4.9x²+6x-35=​9x²+6x-35