Question

Решите неравенство x^2-25x<0

Answer 1

$\displaystyle x^2-25x<0\\x(x-25)<0\\\\ \left \{ {{x<0} \atop {x-25>0}} \right. =\left \{ {{x<0} \atop {x>25}} \right.=x \in \phi\\\\ \left \{ {{x>0} \atop {x-25<0}} \right.=\left \{ {{x>0} \atop {x<25}} \right. =x \in (0,25)\\\\ x \in (0,25)$