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Ionutadelinvisi
a fost răspuns

-Efectuati:
A) (3X²-2X+1)-(X²+4X-5).
B) 20X²-(-5X²+4X-18)-(6-3X)-(2X²+6X-11).
C) (-4a+3b-10c)-(11-2a-4b)+(6a+14c-20b).
-Vreau rezolvarea completa !

Răspuns :

A) (3X²-2X+1)-(X²+4X-5)=
3x²-2x+1-x²-4x+5=
2x²-6x+6=2(x²-3x+3)

B) 20X²-(-5X²+4X-18)-(6-3X)-(2X²+6X-11)=
20x²-5x²-4x+18-6+3x-2x²-6x+11=
13x²-7x+23

C) (-4a+3b-10c)-(11-2a-4b)+(6a+14c-20b)=
-4a+3b-10c-11+2a+4b+6a+14c-20b=
4a-13b+4c-11

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