How do we solve quadratic equations by using the quadratic formula ?

General form of a quadratic equation : AX²+BX+C=0

Formula used to solve ANY quadratic equation:

X = -B + ­­­­Square root of ( B²-4AC)

       ———————————

                      2A

Step 1: Substitute

Step 2: SOLVE!

Step 3: Add

Step 4 : Subtract

Example :

X²-6X+5=0

X= -(-6)+SR( (-6) ²-4(1)(5)

      ---------------------------        =

              2 (1)

X= 6+SR (16)           

    -------------    =   

            2

6+4                                 

------  -->  5           

   2

  6-4

------   --> 1

   2

X : 5 , 1

Finally !!!