laravel edit and update doesn't work - laravel

Question

I have a CRUD with simple date. But I can't get the update method to work.
This is my controller
public function show(Customer $customer)
{
return view('customer.show',compact('customer'));
}
public function edit(Customer $customer)
{
return view('customer.edit', compact('customer'));
}
public function update(CustomerRequest $request, Customer
$customer,$id)
{
$customer = Customer::find($id)->update($request->all());
return redirect()->route('customer.index',compact('customer'));
}
and that is my view
<form method="POST" action="{{route('customer.update',$customer->id ) }}">
{{--{{dd($customer)}}--}}
{{method_field('PUT')}}
{{ csrf_field() }}
<div class="form-group">
<label for="firstName">Voornaam</label>
<input type="text" class="form-control" name="firstName" value="{{$customer->firstName}}">
</div>
<div class="form-group">
<label for="lastName">Achternaam</label>
<input type="text" class="form-control" name="lastName" value="{{$customer->lastName}}">
</div>
<div class="form-group">
<label for="email">Email</label>
<input type="email" class="form-control" name="email" value="{{$customer->email}}">
</div>
<div class="form-group">
<label for="phone">Telefoonnummer</label>
<input type="text" class="form-control" name="phone" value="{{$customer->phone}}">
</div>
<div class="form-group">
<button type="submit" class="btn btn-primary">Update</button>
</div>
</form>
I can go to the edit page. But, after changing the data nothing change it look like that I miss save somewhere but I don't know, now I get that that error too few arguments to function New Controller ::update () 2 passed and exactly 3 expected.
any help will be appreciated.

Answer 1

Change:
public function update(CustomerRequest $request, Customer
$customer,$id)
To:
public function update(CustomerRequest $request, $id)
Or:
public function update(CustomerRequest $request, Customer
$customer)
With the last one you can remove Customer::find($id) and just use $customer
EDIT
If you look at the update route: route('customer.update',$customer->id ) you see it only takes 1 argument. The controller expects 2 because one is the request and the other is the ID.