If a² + b² = 86 and ab = -16, find the value of (a - b)²

Examine the population chart of niger. based on this chart, niger is in the stage of thompson’s demographic transition. a. balance b. growth c. leveling d. replacement

Some fossils provide evidence to suggest that earth's climate has changed over time. which information can scientists obtain from these fossils? check all that apply

Which of the following is not a reason why shenzhen, china, is considered an emerging global city