Răspunsuri

2014-08-16T14:00:40+03:00
2(x²+2x+1) -3(x²-4)+5x²-15x -(9x²+6x+1)=

=2x² +4x +2 -3x²+12 +5x² -15x -9x² -6x-1=

=7x² -9x² +4x -21x+14 -1=

=2x²-17x+13
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  • Utilizator Brainly
2014-08-16T14:15:06+03:00
2(x²+2x+1) -3(x²-4)+5x²-15x -(9x²+6x+1)=2x² +4x +2 -3x²+12 +5x² -15x -9x² -6x-1=7x² -9x² +4x -21x+14 -1=2x²-17x+13