Which are the solutions of x^2 = –5x + 8?

Will mark brainliest question in the pic.

Bismuth-210 is an isotope that radioactively decays by about 13% each day, meaning 13% of the remaining bismuth-210 transforms into another atom (polonium-210 in this case) each day. if you begin with 233 mg of bismuth-210, how much remains after 8 days?

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1