im in math 1314
Here is an example to further explain:
Suppose you are asked to find the square root of -16. Because there is a negative under the radical, we know we will get an i as part of the answer. The square root of 16 is ±4, so we have ±4i. But this is not in standard form. In standard form (as Roman said earlier), you need a real number part and an imaginary part. Our answer for my example is 0 ± 4i
Hope this helped.