Răspunsuri

2014-08-20T01:07:02+03:00
A)15x² -25x +30 -20x² +24x -28 +3x² -6x +6=

=18x² -20x² -59x+24x +36=

= -2x²  -35x +36

b)-6x²-18x +30 -14x²+28x  -42  +25x² +10x -5=

= -20x² +25x² +20x +30 -47=

= 5x ²+20x -17