Solve this equation X^2+8x-13=0

Which of the following is missing in the explicit formula for the compound interest geometric sequence below?

Multiply and simplify. (x - 4) (x^2 – 5x – 6) i will mark brainliest if your answer is right. show how you got the answer. if your answer is correct but does not show how you got the answer you will not be marked brainliest.

240 seventh graders and two-thirds of the students participate in after-school activities how many students participate in after-school activities