Understanding the 'Keep Change Opposite' Method

This video tutorial teaches how to subtract complex numbers using the Keep Change Opposite method. It begins with identifying subtraction problems, then explains the method, which involves keeping the first term, changing the subtraction sign to addition, and taking the opposite of the second term. The tutorial concludes with combining like terms to solve the problem.

What indicates that a problem involves subtraction of complex numbers?

• The presence of imaginary numbers

• Parentheses around numbers

• A minus sign in the middle

• A plus sign in the middle

What is the first step in the 'Keep Change Opposite' method?

• Change the first number

• Opposite the first number

• Keep the first set of numbers unchanged

• Change the subtraction sign to addition

When applying 'Keep Change Opposite', what happens to the subtraction sign?

• It remains the same

• It changes to a division sign

• It changes to a multiplication sign

• It changes to a plus sign

What is the opposite of a negative number in the context of 'Keep Change Opposite'?

• A smaller negative number

• A larger negative number

• A positive number

• Zero

After transforming the problem using 'Keep Change Opposite', what type of problem do you solve?

• A subtraction problem

• A division problem

• A multiplication problem

• An addition problem

How do you combine like terms in the final step?

• Add real parts and subtract imaginary parts

• Subtract real parts and add imaginary parts

• Add both real and imaginary parts separately

• Multiply real and imaginary parts

What is the result of combining 7 and -4 in the example?

• 1

• -3

• 3

• 11