Question

Решите
㏒5 (2-x) = ㏒25 x^4

Answer 1

log5(2-x)=log5²(x^4)
log5(2-x)=2log5(x)
log5(2-x)=log5(x²)
2-x=x²
x=1
x=-2

x∈(-∞;0)∨(0;2)
х=1   х=-2