Question

Rezolvati in Z ecuatiile:

$\sqrt{18} x - \sqrt{50} =0$

$\sqrt{45} x+ } \sqrt{180} =0$
 
Rezolvati in Q ecuatiile:

$3x- \sqrt{3} =0 2x+9=0 [tex] \frac{4}{5} + \frac{3}{4} x=0$

$\sqrt{} \frac{45}{16} x- \frac{ \sqrt{5} }{2} =0$

Va rog sa dati si solutiile..S={...}
si daca nu apartine multimii S=Φ

Multumesc ..dau vot +cel mai bun raspuns+multumesc

Answer 1

$3\sqrt{2}x$-$5 \sqrt{2}$=0=>$3\sqrt{2} x=5 \sqrt{2} => x= \frac{5 \sqrt{2} }{3 \sqrt{2} } = \frac{5}{3} nu apartine lui Z$
$3\sqrt{5}x$+$6\sqrt{5}$=0=>$3 \sqrt{5} x=-6 \sqrt{5} =>x= \frac{-6 \sqrt{5} }{3 \sqrt{5} }=-2 apartine Z$
=>S={-2}
3x=$\sqrt{3}$=>$x= \frac{ \sqrt{3} }{3} nu apartine Q$ e irational
2x+9=0=> 2x=-9=>x=-9/2=-4,5 apartine Q=>S={-9/2}
$\frac{3x}{4} = \frac{-4}{5} => 3x= \frac{-16}{5} => x= \frac{-16}{15}$=>S={-16/15}
$\frac{3 \sqrt{5} }{4} x= \frac{ \sqrt{5} }{2} =>x= \frac{ \sqrt{5}}{2} * \frac{4}{3 \sqrt{5} } = \frac{4}{6} = \frac{2}{3}$ apartine Q=> S={2/3}