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anyone know anything about doing course postgraduate? i'm doing b science and would either want to do a b.commerce or b.economics after i finish my degree how hard is it to get into and what do i need to do?

help hmmm can sum1 tel me how dey got the roots 1+-sqrt(5) from the auxiliary eqn x^2 +2x-4 ??? i get (-2+- sqrt20)/2 same deal with x^2-2x+5 how de hel did dey get 1 +- 2i