Find the zeros of y= x - 4x - 9 by completing the square.
O A. *= 2: 113
O B. x= 3+ /13
O c. *= +3
O D. x=-21,13

The zeros for the given equation are A.

Step-by-step explanation:

Step 1:

To solve for x in a polynomial equation, we use the formula

Here a is the coefficient of , b is the coefficient of and c is the coefficient of the constant term.

In the given equation, .

Step 2:

Substituting the values of a, b, and c in the equation, we get

So the answer is option A.

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

the answer will be b x² +x-1

step-by-step explanation: