Odpowiedź:
a) 7a²+ (-7a²) -3a+5a -4 = 2a-4
b) -3x²+ 3x² -x+ 2x -9+ 4 = x-5
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Verified answer
Odpowiedź:
a) 7a²+ (-7a²) -3a+5a -4 = 2a-4
b) -3x²+ 3x² -x+ 2x -9+ 4 = x-5