Answer:
a perfect square because 17 x 17 = 289
It's not a perfect cube
Step-by-step explanation:
Multiplying ,you get 18x^2+21x-24x-28. You simplify to get:
18x^2-3x-28.
Answer:5π/12
180°=π
75°=x
x=75π ➗ 180
x=5π/12