Question 9
Algebraic ExpressionsIf x = 3 and y = −1, evaluate 2(x2 − y3).
- A.24
- B.22
- C.20
- D.16
Show the answer and explanation
Answer: C (20)
Explanation
x2 = 9 and y3 = −1, so 2(9 − (−1)) = 2 × 10 = 20.
If x = 3 and y = −1, evaluate 2(x2 − y3).
Answer: C (20)
x2 = 9 and y3 = −1, so 2(9 − (−1)) = 2 × 10 = 20.