0\; pri\; x\in R\\\\Otvet:\; x=-1" alt="14400x^3+14400x^2+20736x+20736=0\\\\14400x^2(x+1)+20736(x+1)=0\\\\(x+1)(14400x^2+20736)=0\\\\x+1=0\; \; \to \; \; x=-1\\\\14400x^2+20736>0\; pri\; x\in R\\\\Otvet:\; x=-1" align="absmiddle" class="latex-formula">