PLEASE PLEASE PLEASE HELP!! ASAP!! BRAINLIEST FOR WORK THAT SHOWS ALL STEPS AND CORRECT ANSWERS!! :)

1. Factor the expression: x^6–729. Show your work for full credit.

2. Solve the equation 2x^2+16x–11= -7 by completing the square. Show your work for full credit.

3. Factor over the complex numbers. Show your work for full credit. x^4–5x^2–36