0\; \to \; \; x<0,25\\\\1-4x=(\sqrt5)^4\\\\1-4x=25\\\\4x=-24\\\\\underline {x=-6}" alt="log_{\sqrt5}(1-4x)=4\; \; ,\; \; ODZ:\; 1-4x>0\; \to \; \; x<0,25\\\\1-4x=(\sqrt5)^4\\\\1-4x=25\\\\4x=-24\\\\\underline {x=-6}" align="absmiddle" class="latex-formula">