Question

radical5(x+4)+2radical5(x-2)=radical15​

Answer 1

Răspuns:

$x=\frac{13}{25}$

Explicație pas cu pas:

$\sqrt{5(x+4)} +2\sqrt{5(x-2)} =\sqrt{15} \\(\sqrt{5(x+4)} +2\sqrt{5(x-2)})^2 =(\sqrt{15})^2\\5*x+4+4*5*x-2=15\\5x+4+20x-2=15\\25x+4-2=15\\25x+2=15\\25x=13\\x=\frac{13}{25}$

Succes! :)