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4(x-y+2z)+2(2x+3y-3z)-3(x-2y+2z)=?????
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Răspuns :

Icecon2005
4(x-y+2z)+2(2x+3y-3z)-3(x-2y+2z)=

4x  - 4y + 8z + 4x  +6y - 6z - 3x + 6y - 6z = 5x + 8y - 4z=
Masami
4(x-y+2z)+2(2x+3y-3z)-3(x-2y+2z)=
4x-4y+8z+4x+6y-6z-(3x-6y+6z)=
4x-4y+8z+4x+6y-6z-3x+6y-6z=
5x+8y-4z