Subtracting complex numbers

The video tutorial explains how to add and subtract complex numbers by first distributing the negative sign and then combining like terms. It demonstrates the process of simplifying complex numbers by removing negative signs and breaking down radicals. The tutorial concludes with a simplified result, emphasizing the form a + bi for complex numbers.

What is the first step when subtracting complex numbers?

• Multiply the terms

• Distribute the negative sign

• Add the real parts

• Combine like terms

Why can't you add sqrt(-18) and sqrt(2) directly?

• They are both real numbers

• They are both imaginary numbers

• They have different coefficients

• They are not like terms

How is the square root of a negative number expressed in terms of complex numbers?

• As a rational number

• As a real number

• As an imaginary number

• As a complex number

What is the simplified result of the expression given in the tutorial?

• 8

• 2

• 6

• 4

In the expression a + bi, what does 'b' represent?

• The real part

• The imaginary unit

• The coefficient of the imaginary part

• The square root of a negative number