Question

Which of the following best describes the graph of f(x) = x2 - 3x - 10?

Answer 1

Minimum at (1.5, -12.25) with intercepts at (5, 0) and (-2, 0)

Minimum at (-1.5, -12.25) with intercepts at (-5, 0) and (2, 0)

Minimum at (-3.5, -2.25) with intercepts at (-5, 0) and (-2, 0)

Minimum at (3.5, -2.25) with intercepts at (5, 0) and (2, 0)

Answer 2

you know how to proceed?

Answer 3

no if i did i wouldnt be on here

Answer 4

At first, @yeah_i_suck_at_math can you find the x intercepts of the given function ?

Answer 5

10

Answer 6

One thing that helps me a lot is the software called Geogebra. It's free and available at http://www.geogebra.org/cms/en/download/. You can just type a function like this into it to have it graphed.

Can you tell us what an intercept is? What's an x-intercept? What's a y-intercept?

Answer 7

@BillBell she should be able to find the x intercepts of this function without graphing.

Answer 8

x axis y axis

Answer 9

i should but i cant so you can leave if it bothers you

Answer 10

Just by setting the function equal zero and solving for x.

Answer 11

I'll start you off...

f(x) = x^2 - 3x - 10 setting the function equal to zero,

x^2 - 3x - 10 = 0 Can you solve for x now? (factoring would be good in this case)

Answer 12

theres noway

Answer 13

Can you factor x^2-3x-10=0 ?

Answer 14

no it cant be factored

Answer 15

yes it can be factored !

Answer 16

ok..

Answer 17

Think like this...

you know that the first terms would be (x ) (x ) this way you will get x^2 in the beginning.

you can also tell that because you have a negative middle term and a negative last term that one of the parenthesis will have a - in it, and the other will have a +.

So

(x - ) ( x + )

which 2 numbers would give us a Product (multiplication) of -10, and a sum of -3 ?

Answer 18

\[10=(-5) \times 2=(-2) \times 5=(-10) \times 1=10 \times (-1)\]

check these pairs of factors.

Answer 19

nothing will give u that

Answer 20

You are pushing me to do, alright... ! What about

\[(x+2)(x-5)\] ?

Answer 21

what about that

Answer 22

Does that give you \[x^2-3x-10 ~~~~~~~~~~~~~~~?\]

Answer 23

lol how on earth does make any sense

Answer 24

no? yes?

Answer 25

lol is this even what the question is asking

Answer 26

I am just taking this as - you don't know how to factor. I would really suggest you to contact your teacher whether you are schooled online, or anywhere else.

You got to know this staff, you won't be able to proceed in life without it.

I would be willing to teach you, but you are not willing to get help or guidance, you just want to say this is the answer because, and you will take the answer without the because.

I am really sorry to say all of this. I am also a teenager just like you, and believe me, I know how hard it is without a teacher.

Answer 27

The question is asking you which option is correct. I was just helping you find the x intercepts, but you knowledge seems too small to do this.

Answer 28

oh it is, havent you seen my username ? i might not know how to factor but i damn sure know how to do things that will make me successful, dont confuse your ability to factor with your pride honey, have a good day