Question

Решить уравнение 
375 /(20+х) + 375 / (20-х)=40

Answer 1

375*(20-x)+375*(20+x)=40*(400-x^2)
x≠20 x≠-20
7500-375*x+7500+375*x=16000-40*x^2
15000=16000-40*x^2
40*x^2=1000
x^2=25
x1=5 x2=-5