Evaluating Expressions and Operations

The video tutorial explains how to evaluate the expression a^2 + 10b - 8 by substituting a with 7 and b with -4. It guides through the substitution process, emphasizing the order of operations, and concludes with the final result of the expression.

What is the expression we need to evaluate when a = 7 and b = -4?

• a^2 + 8b - 10

• a^2 - 10b + 8

• a^2 - 8b + 10

• a^2 + 10b - 8

What value should replace 'a' in the expression?

• -4

• 7

• 10

• 4

What value should replace 'b' in the expression?

• 4

• 7

• -4

• 10

What is the result of 7 squared?

• 49

• 14

• 21

• 28

What is the result of 10 times -4?

• -14

• 40

• -40

• 14

What is the result of 49 plus -40?

• -9

• 49

• 9

• 89

What is the final result of the expression after subtracting 8?

• 1

• 9

• 8

• 0