Asap find the zeros of y = x^2 - 4x - 9 by completing the square.

x= 2 + √ 13 ,2- √ 13

Step-by-step explanation:

Replace y with 0 and solve for x

The given equation is :

Replacing y as zero, we get,

Now solving this quadratic equation using formula:

and

Putting a=1, b=-4, c=-9 we get

and

So, option B is the correct answer.

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)

answer:   c ?

step-by-step explanation: