Rewriting complex numbers practice

$\sqrt{49} = 7$ and $\sqrt{-4} = 2i$. So $\sqrt{49} + \sqrt{-4} = 7 + 2i$.

$\sqrt{81} = 9$ and $\sqrt{-25} = 5i$. So $\sqrt{81} + \sqrt{-25} = 9 + 5i$.

$\sqrt{4} = 2$ and $\sqrt{-16} = 4i$. So $\sqrt{4} + \sqrt{-16} = 2 + 4i$.

$\sqrt{64} = 8$ and $\sqrt{-1} = i$. So $\sqrt{64} + \sqrt{-1} = 8 + i$.

$\sqrt{100} = 10$ and $\sqrt{-49} = 7i$. So $\sqrt{100} + \sqrt{-49} = 10 + 7i$.

$\sqrt{36} = 6$ and $\sqrt{-81} = 9i$. So $\sqrt{36} + \sqrt{-81} = 6 + 9i$.

$\sqrt{49} = 7$ and $\sqrt{-16} = 4i$. So $\sqrt{49} - \sqrt{-16} = 7 - 4i$.

$\sqrt{121} = 11$ and $\sqrt{-9} = 3i$. So $\sqrt{121} - \sqrt{-9} = 11 - 3i$.