(−7i)(−7 − 2i) + (5i)(6i)
You asked:
Evaluate the expression: \(-\left( 7 i \right) \left(-7 - 2 i\right) + 5 i \cdot 6 i\)
MathBot Answer:
Evaluated
\(\displaystyle -\left( 7 i \right) \left(-7 - 2 i\right) + 5 i \cdot 6 i = -30 - 7 i \left(-7 - 2 i\right) \)
Expanded
\[-\left( 7 i \right) \left(-7 - 2 i\right) + 5 i \cdot 6 i = -44 + 49 i\]
Factored
\[-\left( 7 i \right) \left(-7 - 2 i\right) + 5 i \cdot 6 i = -44 + 49 i\]
\(i\) is the imaginary unit, defined as \(i^2 = -1\).