(x+4)/(x-4)+(x-4)/(x+4)=10/3 ((x+4)^2+(x-4)^2-(10/3)*(x^2-16))/(x^2-16)=0 x≠±4 (x+4)^2+(x-4)^2-(10/3)*(x^2-16)=0 x^2+32x+16+x^2-32x+16-(10x^2)/3+160/3=0 -8x^2+256/3=0 x^2=32/3 x=±4√(2/3)
1) х=2*4*160 х=1280 проверка 1280/4/160=2 2) х*4*2=160 х=160/8 х=20 проверка 20*4*2=160 3) х*4=160*2 х=320/4 х=80 проверка 80*4=160*2