How can I redirect update old image in php ajax?

this is my current code

 
                        Image
                        
                          
                          
                          <img src="" alt=" width="150">
                        
                      

var editImageFile = $('#edit-image')[0].files[0];
formData.append('image_old', $('#edit-image-old').val());

        if (editImageFile) {
            formData.append('image', editImageFile);
        }