What is the vertex form of #y= -25x^2 + 8x - 13 #?

1 Answer
May 28, 2018

Vertex form of equation is #y = -25 (x-0.16)^2-12.36 #

Explanation:

#y = -25 x^2+8 x -13# or

#y = -25 (x^2-8/25 x) -13# or

#y = -25 {x^2-8/25 x + (4/25)^2}+25 *16/625 -13# or

#y = -25 (x-4/25)^2+16/25 -13# or

#y = -25 (x-4/25)^2-309/25# or

#y = -25 (x-0.16)^2-12.36 :. # Vertex is at

#(0.16 , -12.36)# and vertex form of equation is

#y = -25 (x-0.16)^2-12.36 # [Ans]