What is 6+2+x^2 in standard form?

What is the binomial expansion of (2x-3)^5

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

Polynomial that can be factored as (3x-4)(3x+4)