Plz help will give brainless only if correct

Identify the number as a rational or irrational. explain. 127

Factor the polynomial 4x4 – 20x2 – 3x2 + 15 by grouping. what is the resulting expression? (4x2 + 3)(x2 – 5) (4x2 – 3)(x2 – 5) (4x2 – 5)(x2 + 3) (4x2 + 5)(x2 – 3)

To decrease an amount by 16% what single multiplier would you use