Wheel bearings ford focus?

I had my car serviced and it had new rear brake drums fitted, 2 days later i hear a rubbering sound coming from the offside rear wheel, took back to garage and they told me the bearings was all shoot and that the car was to dangerous to drive home, could this be true, would they off noticed this then servicing the car, what could of happened

I had my car serviced and it had new rear brake drums fitted, 2 days later i hear a rubbering sound coming from the offside rear wheel, took back to garage and they told me the bearings was all shoot and that the car was to dangerous to drive home, could this be true, would they off noticed this then servicing the car, what could of happened it is a horizontal parabola, but its vertex is not (0,0), thats what's wrong.

consider the vertex must be the midpoint between the focus and the directrix, and the distance between them is 9 units (from -3 to 6)

so -3 6 / 2 = 3/2 <<< this is h and k=0

V( 3/2, 0), F(h p, k), D-> x=h-p

h p = -3
3/2 p = -3
p= -3-3/2
p= -9/2

(y-k)^2 = 4p(x-h)
(y-0)^2 = 4(-9/2)(x-3/2)
y^2 = -18(x-3/2)
y^2 = -18x 27
y^2 18x -27 =0 <<<<<< equation It's more likely a brake backing plate got bent a little when putting a tire back on and the backing plate is just rubbing on the rotor. The shop that did the work was the problem. They did not properly tighten the wheel bearing after they changed the drum. The problem for you is to prove it. It could be true. Worn out wheel bearings can fall apart and let the wheel fly off the car. Does that sound safe to you? Grasp the tire and see if you can make it wobble or move back and forth. Do it from north and south and then from the east and west sides. Also with the wheels ofl of the ground you can check it. Pulling it back and forth and finding lots of leeway may indicate the center nut on the hub is loose. Times past sometimes shady mechanics would loosen one to create a problem and make it sound like an expensive repair. If you did not have this problem before brake/drum replacement, then the most likely cause is failure of the installer to keep your bearings and hubs clean of contaminates during his work, and or did not clean and service them at the time he did the work, and or improperly tourqued the wheel bearing retaing nuts!
for reals!

If I was you, I would I would take a copy of this answer to them demand them to remedy the problem for free, or pay for remedy by anoither shop who will not be so negligent!

It's more likely a brake backing plate got bent a little when putting a tire back on and the backing plate is just rubbing on the rotor.

The shop that did the work was the problem. They did not properly tighten the wheel bearing after they changed the drum. The problem for you is to prove it.

It could be true. Worn out wheel bearings can fall apart and let the wheel fly off the car. Does that sound safe to you?

Grasp the tire and see if you can make it wobble or move back and forth. Do it from north and south and then from the east and west sides. Also with the wheels ofl of the ground you can check it. Pulling it back and forth and finding lots of leeway may indicate the center nut on the hub is loose. Times past sometimes shady mechanics would loosen one to create a problem and make it sound like an expensive repair.

If you did not have this problem before brake/drum replacement, then the most likely cause is failure of the installer to keep your bearings and hubs clean of contaminates during his work, and or did not clean and service them at the time he did the work, and or improperly tourqued the wheel bearing retaing nuts!
for reals!

If I was you, I would I would take a copy of this answer to them demand them to remedy the problem for free, or pay for remedy by anoither shop who will not be so negligent!