Question

The modulus of complex number -1+is choose the correct option

​

Answer 1

$let \: \: \: z = - 1 + i \\ here \: \: x = - 1 \: \: \: \: \: \: \: \: y = 1 \\ |z| = \sqrt{ {x}^{2} + {y}^{2} } \\ |z| = \sqrt{( { - 1})^{2} + {1}^{2} } \\ |z| = \sqrt{1 + 1} = \sqrt{2}$