SAT Math Multiple Choice Question 2: Answer and Explanation

Home > SAT Test > SAT Math Multiple Choice Practice Tests

Test Information

Question: 2

2. If a = −2, then a + a2a3 + a4a5 =

  • A. −22
  • B. −18
  • C. 32
  • D. 58

Correct Answer: D

Explanation:

D Plug in the number given for a in the expression to find the value: −2 + (−2)2 − (−2)3 + (−2)4 − (−2)5. Remember PEMDAS, the order of operations: The first thing to do here is deal with the Exponents, then we can take care of the Addition and Subtraction: −2 + 4 − (−8) + 16 − (−32), which simplifies to −2 + 4 + 8 + 16 + 32 = 58, (D).

Previous       Next