Looking for something else?

Not the answer you are looking for? Search for more explanations.

## More answers

Looking for something else?

Not the answer you are looking for? Search for more explanations.

- anonymous

Using the quadratic function, provide the x intercepts of x^2+4x-21
Can someone just tell me what the quadratic function is..?

At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

Get our expert's

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this

and **thousands** of other questions.

Get your **free** account and access **expert** answers to this and **thousands** of other questions

- anonymous

- jamiebookeater

I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!

Get this expert

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this

and **thousands** of other questions

- myininaya

The quadratic function you have is x^2+4x-21
The graph will be a parabola

- myininaya

To find the x-intercepts, set your quadratic expression(function) equal to 0.
Then solve for x.

- anonymous

hmm
thats what i did @myininaya and i got x = -7 and 3 but the teacher wrote -2 and use quadratic function..

Looking for something else?

Not the answer you are looking for? Search for more explanations.

- myininaya

What is -2 suppose to be ?
Your x-intercepts are correct for this quadratic function.

- anonymous

Oh im just saying he took off 2 points and wrote use quadratic function.

- myininaya

Does he mean formula?

- myininaya

The quadratic formula is
\[x=\frac{-b \pm \sqrt{b^2-4ac}}{2a} \]

- anonymous

hmm ill try it.

- anonymous

Thanks for your help

- myininaya

Np. Good luck.

- anonymous

tnx

- anonymous

oh if you do the quadratic function you get 3 and -7. Can you check that for me? @myininaya

- anonymous

actually, never mind. I see his point but you could have just done (x+7) (x-3) and gotten the intercepts that way.

- anonymous

do you write it as (3,0) and (-7,0) though?

- myininaya

Yep
You could have factored or used the quadratic formula.

- myininaya

It is more proper to say the x-intercepts are (3,0) and (-7,0)
I would say it is informal to say they are 3 and -7

- anonymous

Yea, i understand.

- myininaya

Coolness.

Looking for something else?

Not the answer you are looking for? Search for more explanations.