<h2>
Answer with explanation:</h2>
The given function : 
Using completing the squares, we have
  [∵
        [∵  ]
]
  (1)
      (1)
Comparing (1) to the standard vertex form  , the vertex of function is at (h,k)=(-1,-4)
 , the vertex of function is at (h,k)=(-1,-4)
For x-intercept, put f(x)=0 in (1), we get 
  
    
Square root on both sides, we get

∴ x intercepts : x= (-3,0) and (1,0)
For y-intercept put x=0 in (1), we get
  
  
∴ y intercept : (0,-3)
Axis of symmetry : 
In  , a=1 and b=2
 , a=1 and b=2
Axis of symmetry=