(−3i)(−i) + (4i)(−7 − 7i)
You asked:
Evaluate the expression: \(-\left( 3 i \right) \cdot -i + 4 i \left(-7 - 7 i\right)\)
MathBot Answer:
Evaluated
\(\displaystyle -\left( 3 i \right) \cdot -i + 4 i \left(-7 - 7 i\right) = -3 + 4 i \left(-7 - 7 i\right) \)
Expanded
\[-\left( 3 i \right) \cdot -i + 4 i \left(-7 - 7 i\right) = 25 - 28 i\]
Factored
\[-\left( 3 i \right) \cdot -i + 4 i \left(-7 - 7 i\right) = 25 - 28 i\]
\(i\) is the imaginary unit, defined as \(i^2 = -1\).