Multiplying two imaginary numbers then simplifying the expression to a real number

The video tutorial explains how to multiply two imaginary numbers by treating them as monomials. It covers the multiplication of coefficients and the concept of I squared, which equals -1. The final result is obtained by multiplying the product of the coefficients with -1, resulting in a positive number.

What is the first step in multiplying two imaginary numbers like -3i and 7i?

• Multiply the coefficients

• Add the coefficients

• Subtract the coefficients

• Divide the coefficients

When multiplying -3i and 7i, what is the result of multiplying the coefficients?

• -21

• 21

• -10

• 10

What does i squared equal in terms of real numbers?

• -1

• 1

• 0

• i

After simplifying i squared to -1, what is the final result of multiplying -3i and 7i?

• -21

• 21

• -1

• 1

What is the significance of i in imaginary numbers?

• It represents the square root of 2

• It represents the square root of -1

• It represents the square root of 1

• It represents the square root of 0