November 2018 2 16 Report
Zredukuj wyrazy podobne.
a) 2 n^{2} - 3n^{2} -  5n^{2} + 7n - 3n^{2} - 9n

b) -0,2x^{2} - 2x + 1,9x^{2} - x + 0,2x^{2}

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