Note: Enter your answer and show all the steps that you use to solve this problem in the space provided. Simplify the expression
8^2+9(12/3x2)-7. Explain each

Explain how to do it step by step please.

What number must you add to complete the square x^2+12x=16

Factor this polynomial completely x^2-64

Which polynomial correctly combines the like terms and expresses the given polynomial in standard form? 8mn5 – 2m6 + 5m2n4 – m3n3 + n6 – 4m6 + 9m2n4 – mn5 – 4m3n3 n6 + 7mn5 + 14m2n4 – 5m3n3 – 6m6 –2m6 – 5m3n3 + 14m2n4 + 7mn5 + n6 14m2n4 + 7mn5 – 6m6 – 5m3n3 + n6 n6 – 6m6 + 7mn5 + 14m2n4 – 5m3n3 show work