How would you graph 4x^2 + 8x - 5

Understand the explanation

Explanation:

y = 4x2+8x-22

Taking out 4 as a common factor as 'a' is always a factor to be taken out

y = 4 (x2+2x-112)

use completing the square method

y = 4 (x2+2x+1-11 2-1)

convert the equation in the form

y = a (x-h) 2+k y=4 (x+1) 2/13 2

I hope now can get vertex, x, and y-intercept AND axis of symmetry