Evaluating the Expression b² - 4ac

The video tutorial explains how to evaluate the expression b squared minus 4ac by substituting given values for a, b, and c. It demonstrates the process of substitution, simplification using the order of operations, and final calculation to arrive at the result of negative 23. The tutorial emphasizes the importance of following the correct mathematical procedures to ensure accurate results.

What values are substituted for a, b, and c in the expression b² - 4ac?

• a = 2, b = -5, c = 6

• a = -2, b = 5, c = -6

• a = 2, b = 5, c = -6

• a = -2, b = -5, c = 6

What is the first step after substituting the values into the expression b² - 4ac?

• Add the values

• Divide the values

• Multiply the values

• Simplify the exponents

What is the result of 5 squared in the expression?

• 35

• 20

• 25

• 30

What is the result of multiplying -4, -2, and -6?

• 36

• -36

• 48

• -48

What operation is performed after simplifying the exponents?

• Addition

• Subtraction

• Division

• Multiplication

What is the final result of the expression b² - 4ac?

• -25

• 23

• -23

• 25

How is 25 minus 48 equivalent to another expression?

• Negative 25 minus 48

• 25 plus 48

• 25 plus negative 48

• Negative 25 plus 48

What is the significance of the order of operations in this problem?

• It allows for division before multiplication

• It is not important in this problem

• It ensures the correct sequence of operations

• It helps in adding the numbers correctly