Learn how to divide a number by a complex number and the conjugate

The video tutorial covers solving a mathematical problem involving complex numbers. It begins with setting up the problem and highlights common mistakes when applying the distributive property. The teacher explains the concept of complex conjugates and their importance in simplifying expressions. The tutorial proceeds with detailed steps for multiplication and simplification, leading to the final result expressed in standard form. The focus is on understanding the process and correctly applying mathematical principles.

What is the mistake in multiplying a complex number by 'i' directly?

• It results in a real number.

• It does not eliminate the imaginary part.

• It makes the expression undefined.

• It simplifies the expression too much.

What is the complex conjugate of a complex number?

• The reciprocal of the complex number.

• The same number with the opposite sign of the imaginary part.

• The square of the complex number.

• The same number with the opposite sign of the real part.

Why is the difference of two squares important in this context?

• It is necessary for converting to polar form.

• It helps in finding the roots of the equation.

• It simplifies the multiplication of complex numbers.

• It is used to eliminate the imaginary part.

How do you express a complex number in the form A + Bi?

• By multiplying the real part by 'i'.

• By subtracting the imaginary part from the real part.

• By separating the real and imaginary parts over a common denominator.

• By adding the real and imaginary parts.

What is the final simplified form of the expression in the video?

• 18/37 + 3i/37

• 18 - 3i

• 18/37 - 3i/37

• 15i/37