Answer:
Step-by-step explanation:
(5x-3)(5x-1) =
25 x^2 -20x +3 =
25 ( x^2 - 20/25x) + 3 = Complete the square for 'x'
25 ( x^2 - 4/5x ) + 3
25 (x^2 - 4/5 x + 4/25) -4 + 3
25 ( x-2/5)^2 -1 Done . Vertex is ( 2/5 , -1)
