$\left(9-9i\right)\left(7+i\right)$
You asked:
Evaluate the expression: \(\left(9 - 9 i\right) \cdot \left(7 + i\right)\)
MathBot Answer:
Evaluated
\(\displaystyle \left(9 - 9 i\right) \cdot \left(7 + i\right) = \left(7 + i\right) \left(9 - 9 i\right) \)
Expanded
\[\left(9 - 9 i\right) \cdot \left(7 + i\right) = 72 - 54 i\]
\(i\) is the imaginary unit, defined as \(i^2 = -1\).