Question

lg (x-2)+lg x=lg8

0,5^x^2-2<_1/4

(5^-2/5)^5+ ((0,2)^3/4)^-4

Answer 1

Lg(x^2-2x)=Lg8
x^2-2x=8
x^2-2x-8=0
Д=4+32=36
x1=2+6/2=6
x2=2-6/2=-2