Odpowiedź:
a) 5x-(-x)+(-5+x)= 5x+x-5-x=5x-5
b) 7xy+12x²-0,5x²-xy+7xy+2xy=15xy+11,5x²
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Odpowiedź:
a) 5x-(-x)+(-5+x)= 5x+x-5-x=5x-5
b) 7xy+12x²-0,5x²-xy+7xy+2xy=15xy+11,5x²