\(\overrightarrow x = \overrightarrow a + \overrightarrow b \) \( = \left( {1 + 0; - 2 + 3} \right) = \left( {1;1} \right)\).
\(\overrightarrow y = \overrightarrow a - \overrightarrow b \) \( = \left( {1 - 0; - 2 - 3} \right) = \left( {1; - 5} \right)\).
\(\overrightarrow z = 3\overrightarrow a - 4\overrightarrow b \)\( = \left( {3.1 - 4.0;3.\left( { - 2} \right) - 4.3} \right)\)\( = \left( {3; - 18} \right)\).
