Question

300/(25 - V) + 300/(25 + V) = 37,5

Answer 1

300*(25+V)/(25+V)(25-V) + 300(25-V)/(25+V)(25-V)=37,5;
7500+300V+7500-300V/(25+V)(25-V)=37,5;
15000/(25+V)(25-V)=37,5;
15000/625-V^2=37,5;
15000:37,5=625-V^2;
400=625-V^2;
V^2=625-400;
V^2=225;
V=15

Answer 2

спасибо