00:01
Okay, so we want to compute the value of this in standard form, and when we have a bracket squared, we simply just have the bracket times itself.
00:10
Okay? now, remember here, i is equal to the square root of minus 1, and if we have i times i, if it's a square root of minus 1, if it's a square root of minus 1, i squared is minus 1.
00:25
Okay, so let's expand this here.
00:27
We'll have our nice little grid to make sure it know.
00:30
Nice and easy for us.
00:31
Three minus four i.
00:34
Three minus four i.
00:37
Three times three is nine.
00:38
Three times minus four is minus 12.
00:42
Now make sure we got our i there.
00:43
Again, same here.
00:45
Now this is the interesting bit, but we have to use this rule here.
00:48
The i squared is equal to minus one...