(2-i)(2+i)
You asked:
Evaluate the expression: \(\left(2 - i\right) \cdot \left(2 + i\right)\)
MathBot Answer:
Evaluated
\(\displaystyle \left(2 - i\right) \cdot \left(2 + i\right) = \left(2 - i\right) \left(2 + i\right) \)
Expanded
\[\left(2 - i\right) \cdot \left(2 + i\right) = 5\]
\(i\) is the imaginary unit, defined as \(i^2 = -1\).