A quadratic equation is shown below:
x2 - 8x + 13 = 0
Which of the following is the first correct step to write the above equation in the form (x - p)2 = q, where p and q are integers?
Subtract 5 from both sides of the equation
Subtract 3 from both sides of the equation
Add 5 to both sides of the equation
Add 3 to both sides of the equation

- anonymous

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- myininaya

do you know how to complete the square?
let's practice
do you think x^2-2x+1 can be written as a square?

- anonymous

yes

- anonymous

@myininaya

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## More answers

- anonymous

i was thnking it was D?

- myininaya

can you write is as a square for me?

- anonymous

(X-1)^2

- myininaya

okay so if you do that then we have
x^2-8x+13+3=0+3
x^2-8x+16=3

- myininaya

so are you think x^2-8x+16 can be written as square?

- myininaya

and you are right about my example

- anonymous

Yes

- myininaya

x^2-8x+16 can be written as (x- ? )^2

- myininaya

what is ?

- anonymous

(x-4)^2

- myininaya

yeah

- myininaya

you did this all by yourself @kristinak

- anonymous

yeah but i still dont know the answer

- myininaya

you are saying we have (x-4)^2=3

- myininaya

4 and 3 are totally integers

- anonymous

so its b?

- myininaya

:(

- myininaya

Can you tell me where you are confused on your first choice?

- anonymous

i thought you said i was wrong when i said it was D?

- myininaya

never said that

- myininaya

i simply was working through what D would have given us

- myininaya

do you not think 4 and 3 are integers?

- anonymous

No they are

- anonymous

thank you so much, sorry i was confused

- myininaya

its okay

- anonymous

can you help me with another?

- myininaya

alright

- anonymous

one moment

- anonymous

##### 1 Attachment

- anonymous

@myininaya

- anonymous

its the screenshot

- myininaya

can you find the vertex for the first one?

- anonymous

one moment

- anonymous

(70,55)

- anonymous

am i right?

- myininaya

beautiful!

- myininaya

now the vertex is very important for consider the min or even the max for a parabola
that is why i asked
for the other graph i think a good way to approximate the vertex is just plot those points given

- myininaya

i want you to speculate on what you think the vertex is

- myininaya

now it helped me to actually plot the points
so i encourage you to do so

- myininaya

tell me what you think looks like the middle point of that graph

- anonymous

(1,899.50)

- myininaya

that is very great

- myininaya

now the y values for each of these points is the amount of min production cost from each graph

- myininaya

aka lowest y value for each graph

- myininaya

the question ask you to compare the y values basically
it ask which one is greater

- anonymous

company 2?

- myininaya

right because 899.5>55
so company 2 has a bigger min production cost

- anonymous

thank you!! can you help me with like 2 or 3 more?

- myininaya

honestly
i cannot
i have to leave
i suggest posting a new question

- anonymous

oh okay thank you

- myininaya

np
have a great night

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