Compute. \[ (50 + 72i)^2 - (50 - 72i)^2 \]
\((50 + 72i)^2 - (50 - 72i)^2\\ =50^2+(72i)^2+(2*50*72i)\quad -[50^2+(-72i)^2-(2*50*72i)]\\ =2*(2*50*72i)\\ =14400i \)
The answer is 17200*i.
The answer is 14400 i.
