Question

PLEASE HELP ME WITH BOTH I AM CONFUSION

Answer 1

`\bf \boxed{16=4^2}\qquad -√(16)\implies -1\cdot √(16)\implies -1\cdot √(4^2)\implies -1\cdot 4 \\\\\\ -4\\\\ -------------------------------\\\\ \boxed{169=13^2}\qquad x^2=-169\implies x^2=-1\cdot 169\implies x^2=-1\cdot 13^2 \\\\\\ \textit{now, taking }√(\qquad )\textit{ to both sides} \\\\\\ √(x^2)=√(-1\cdot 13^2)\implies x=√(-1\cdot 13^2)\implies x=√(-1)\cdot √(13^2) \\\\\\ x=i\cdot 13\implies x=13i`