Level
1

**STEP 1**: 1 = 1

**STEP 2**: 1 = $\sqrt { 1 }$

**STEP 3**: 1 = $\sqrt { -1\times -1 }$

**STEP 4**: 1 = $\sqrt { -1 } \times \sqrt { -1 }$ or $i\quad \times \quad i$

**STEP 5**: 1= ${ \left( \sqrt { -1 } \right) }^{ 2 }$ or ${ i }^{ 2 }$

**STEP 6**: 1 = -1

*Question*: **THE ERROR IS IN WHICH STEP?**