Question

Please help. urgent.
Simplify the given expression:
sqrt -64 over (7-6i)-(2-2i)

Answer 1

\[i ^{2}=-1\]
\[\sqrt{-64}=\sqrt{64 i ^{2}}\]
Let A=7-6i and B=2-2i
\[1=(A+B)\div(A+B)\]
\[(8i \div(A-B))\times1=(8i \div(A-B))\times((A+B)\div(A+B))\]
The resulted formula after simplification will be in the form of:\[(8i \times (A+B))/(A ^{2}-B ^{2})\]

Just replace A and B with 7-6i and 2-2i, you'll get your answer. ;)