Evaluating Functions in DeltaMath: Level 2 Challenges

This video tutorial provides instructions on evaluating functions using the Delta Math online system. It includes two examples: evaluating f(x) for x = -8 and x = -4. The video demonstrates the process of substituting values into the function, applying the order of operations, and simplifying the expression to find the correct result. The tutorial emphasizes the importance of handling negative numbers and using function notation correctly.

What is the function given in the first example?

• f(x) = -2x^2 + 10x - 13

• f(x) = x^2 + 3x - 15

• f(x) = 2x^2 - 10x + 13

• f(x) = -x^2 - 3x + 15

What value of x is used to evaluate the function in the first example?

• x = -8

• x = 4

• x = 8

• x = -4

What is the result of squaring -8 in the first example?

• 16

• -64

• -16

• 64

What is the final value of f(-8) in the first example?

• 40

• -40

• 25

• -25

What is the function given in the second example?

• f(x) = x^2 + 3x - 15

• f(x) = 2x^2 - 10x + 13

• f(x) = -x^2 - 3x + 15

• f(x) = -2x^2 + 10x - 13

What value of x is used to evaluate the function in the second example?

• x = 8

• x = -8

• x = -4

• x = 4

What is the result of squaring -4 in the second example?

• 16

• -16

• -64

• 64

What is the result of multiplying 2 by 16 in the second example?

• 40

• -32

• 32

• -40

What is the result of multiplying -10 by -4 in the second example?

• -40

• 40

• -24

• 24

What is the final value of f(-4) in the second example?

• 32

• 40

• 85

• 72