Complex Numbers

Imaginary and Complex Numbers

What happens when you take the square root of a negative number.

Operations with Complex Numbers

How to add, subtract, multiply, and simplify expressions involving imaginary numbers.

Solving Equations with Complex Solutions

What to do when the square root of a negative number shows up.

Solving Radical Equations

Isolate the radical, square both sides, and always check your answers.

Square Root Functions and Their Graphs

Shifting, stretching, and reflecting the curve that starts at a corner.