Zadaci:$$ $$ a) $$ 3 X + 19 x^2 + 5x - 3 = 0$$ b) $$ 4x^2 - 3 x + 9 = 0$$ c) $$x^2 + 4x + 4 4 X^{2} - \frac{ x - 2 }{\ x ^{2}+ 2 x-3}= -{ 4\over \sqrt{x^5}}+ x - 79 0$$ d) $$3x^2 - 6x + 2 = 4 $$ e) $$ 3 X^{2}-\frac{1}{ 3 } X^{3} = 0 $$ f) $$ f(x) = { 10 x^{-3/ 4 }} \implies {dy \over dx} $$ g) $$ \binom{21}{x}\sum_{x}^{x+12} ( X+2X - 14 ) $$ h) $$ X^{3} - 14 X - 14 + 10 X^{2}-\frac{1}{ 4 } Y^{2} = 0 $$ i) $$ 19 \cdot x^{3} - \frac{x^{2}- 3 \cdot x+3}{x^{2}-1}+4 = 19 $$