Huilan is 6 years younger than Thomas. The sum of their ages is 64. What is Thomas's age?

Factor completely. 4p^2 + 36p + 81 express the answer in the form (ap + b)^2

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)

The length of the line segment joining the midpoints of sides ab and bc of the parallelogram abcd is 10. find the length of diagnol ac