(x/4)=-8 what does x equal? can you explain how you got the answer?

what

answer4 to the second power is 16

and 4 to the third power is 64,

the image is given below

since the options are not given so we draw it from the equation

the given equation is

y = (x-1) (x+4)

y = y² + 3x - 4

the above equation is a quadratic equation which will have two roots. if we draw the graph for it, it will look like this

(5x-1)^2= (5x)^2-2(5x)×1+(1)^2=25x^2-10x+1