Question

Solve by square rooting
X^2+4=0

Answer 1

`\bf x^2+4=0\implies x^2=-4\implies x^2=-2^2\implies√(x^2)=√(-2^2) \\\\\\ x=√(2^2\cdot -1)\implies x=√(2^2)\cdot √(-1)\implies x=2i`