# GRE Subject Test: Math : Operations on Complex Numbers

## Example Questions

### Example Question #92 : Algebra

Explanation:

Take out i (the square root of -1) from both radicals, simplify, and then multiply. You are not allowed to first multiply the radicals and then simplify because the roots are negative.

### Example Question #21 : Operations On Complex Numbers

Explanation:

Take out i (the square root of -1) from both radicals, simplify, and then multiply. You are not allowed to first multiply the radicals and then simplify because the roots are negative.

### Example Question #21 : Operations On Complex Numbers

Explanation:

Take out i (the square root of -1) from both radicals and then multiply. You are not allowed to first multiply the radicals and then simplify because the roots are negative.

It might be difficult to tell that this simplifies but you should always check if the perfect squares (4, 9, 16, etc) divide into this number. 9 does divide into 495 so this simplifies further.