A cubic function only has 3 solutions at which x = 0, never 4. For example the function y =

gives the solutions:
x = 0, x = -1 and x = -2
Answer:
x = 98 mm
Step-by-step explanation:
The angle bisector YT divides the triangle into proportional segments:
VY/VT = KY/KT
Filling in the numbers and multiplying by VT, we have ...
VY/57 = 68/129.2
VY = 57·68/129.2 = 30
Then we can find x from ...
x = VY + YK = 30 +68 = 98 . . . mm
The value of x is 98 mm.
K = y/x OR y = kx
hope it helps!
Answer:
the answer to this is x=16.1