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. An alternative method for calculation is also discussed, emphasizing the importance of understanding different approaches to solving mathematical expressions.

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

• a = 3, b = 7, c = -6

• a = 2, b = 5, c = -4

• a = 1, b = 6, c = -3

• a = 4, b = 8, c = -7

What is the result of substituting the values into b²?

• 64

• 25

• 49

• 36

What is the first step in evaluating the expression after substitution?

• Dividing the terms

• Multiplying the constants

• Adding the numbers

• Simplifying the exponents

What is the result of the expression 7² - 4 * 3 * (-6) after simplification?

• 121

• 49

• 0

• 72

What is the result of multiplying 4, 3, and -6?

• 72

• -72

• -18

• 18

How do you interpret subtracting a negative number in the expression?

• As adding a negative

• As subtracting zero

• As adding a positive

• As subtracting a positive

What is the alternative way to view the multiplication in the expression?

• Positive four times positive three times negative six

• Negative four times positive three times negative six

• Negative four times negative three times positive six

• Positive four times negative three times positive six

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

• 121

• 72

• 0

• 49

What is the sum of 49 and 72?

• 131

• 101

• 121

• 111