Zadaci:$$ $$ a) $$ 9 X + 19 x^2 + 5x - 3 = 0$$ b) $$ 4x^2 - 9 x + 9 = 0$$ c) $$x^2 + 4x + 4 2 X^{2} - \frac{ x - 7 }{\ x ^{2}+ 3 x-3}= -{ 10\over \sqrt{x^5}}+ x - 64 0$$ d) $$3x^2 - 6x + 2 = 2 $$ e) $$ 9 X^{2}-\frac{1}{ 9 } X^{3} = 0 $$ f) $$ f(x) = { 10 x^{-3/ 2 }} \implies {dy \over dx} $$ g) $$ \binom{21}{x}\sum_{x}^{x+12} ( X+2X - 9 ) $$ h) $$ X^{3} - 9 X - 9 + 10 X^{2}-\frac{1}{ 2 } Y^{2} = 0 $$ i) $$ 19 \cdot x^{3} - \frac{x^{2}- 9 \cdot x+3}{x^{2}-1}+4 = 19 $$