Order of Operations and Expression Simplification

The video tutorial explains how to evaluate the expression (B^2 - 4ac) / 2a by substituting given values for a, B, and c. It guides through the process of simplifying the expression by handling the numerator and denominator separately, performing arithmetic operations in the correct order, and finally verifying the result using a graphing calculator. The expression simplifies to 90 when a = 2, B = 20, and c = 5.

What values are substituted for a, b, and c in the expression?

• a = 2, b = 20, c = 5

• a = 5, b = 20, c = 2

• a = 20, b = 5, c = 2

• a = 2, b = 5, c = 20

What is the first step in simplifying the expression?

• Divide the values

• Multiply the values

• Substitute the values

• Add the values

What is the result of simplifying the numerator 20^2?

• 200

• 40

• 20

• 400

What operation is performed in the denominator of the expression?

• Multiplication

• Division

• Addition

• Subtraction

What is the simplified form of the numerator after subtraction?

• 40

• 360

• 400

• 3600

What is the final result of the expression after division?

• 90

• 360

• 45

• 180

What is the correct order of operations when simplifying the expression?

• Subtract, then divide

• Multiply, then add

• Multiply and divide, then add and subtract

• Add, then multiply

What is the result of multiplying 4, 2, and 5 in the expression?

• 50

• 10

• 40

• 20

What is the purpose of using a graphing calculator in this context?

• To graph the expression

• To find the value of a variable

• To calculate a different expression

• To verify the result

What is the final step in verifying the expression's result?

• Check with a different method

• Use a graphing calculator

• Ask a peer to verify

• Recalculate manually