1/2d+6=1/2(d+12)
Leaving us with 0.5 or 1/2
One decimal place to the left decimal point is the place.
Answer:

Step-by-step explanation:
Given that alpha and beta be conjugate complex numbers
such that frac{\alpha}{\beta^2} is a real number and alpha - \beta| = 2 \sqrt{3}.
Let

since they are conjugates


Imaginary part of the above =0
i.e. 
So the value of alpha = 
4(8x-2)
Distribute the 4
So it should be 32x-8
Hope it helps