Copy a triangle construction
Answer:
tanx=30/27
tanx=10/9
x=48
x^3 -2x^2 -1 + (x-1)
= x^3 -2x^2 + x -2
= (x-2)(x^2+1)
Hope this helps!
x = 21.3 repeating. so put the - on top of the 3 if you're writing it down