Question

A quadratic equation is shown below:

9x2 - 16x + 60 = 0

Part A: Describe the solution(s) to the equation by just determining the discriminant. Show your work. (3 points)

Part B: Solve 4x2 + 8x - 5 = 0 by using an appropriate method. Show the steps of your work and explain why you chose the method used. (4 points)
Will medal fan and write a testimony.. please help!


Part C: Solve 2x2 -12x + 5 = 0 by using a method different from the one you used in Part B. Show the steps of your work. (3 points)

Answer 1

First step do you know how to find the discriminant

Answer 2

No i dont.. :/

Answer 3

Okay it is \[b ^{2}-4ac\]

Answer 4

So you plug the numbers from your equation into this and solve...
It would look like this: \[-16^{2}-4(9)(60)\]

Answer 5

Okay so if i solve that that will give me the discriminant?

Answer 6

I just evaluate that as much as a i can?

Answer 7

@ihateschool18

Answer 8

Yes it will tell me what you get so I can make sure you solve correctly

Answer 9

Okay thank you so much so far :)

Answer 10

okay so -2416

Answer 11

Welcome :)

Answer 12

okay so i solved the equation you gave me... It comes up to -2416

Answer 13

One sec

Answer 14

256-4(9)(60)=
256-2160=
-1904

Answer 15

So do you get part A?

Answer 16

I understand a little. I have no idea what a discriminant does but as long as a i can do the work its fine. Thanks for part A

Answer 17

@ihateschool18

Answer 18

Yupp.. So moving to part B

Answer 19

ohkayy.. So. I think you have to factor maybe.

Answer 20

Good! Do you know how to factor this?

Answer 21

ehhhh :/ i Could fiqure it out online without using your time. Could you help with c please?

Answer 22

@ihateschool18

Answer 23

Oh... Nvm its the same sortof.

Answer 24

Ill just give it to you (2x-1)(2x+5). Are you sure you know what to do after that? Id you do we can move to c...

Answer 25

If*

Answer 26

It states in part A that there are multiple solutions, Does this mean they are asking for more then just the discriminate?

Answer 27

i could probably figure it out thank you though :)

Answer 28

Pare A was asking you to solve for the discriminant. After you solved for the discriminant the number you get tells you how many solutions you have.

Answer 29

-_- i hate math.... okay.

Answer 30

So if i just factor the other part that would be it for this problem?

Answer 31

For part C because we factored we have to solve using a different method..I would probably use the quadratic formula or something...Do you know the formula?

Answer 32

I could find it. I have it qritten down somewhere. and i know its online.

Answer 33

\[\frac{ -b \pm \sqrt{b ^{2}-4ac}}{ 2a}\]

Answer 34

Im sorry im super confused already.

Answer 35

Why would i wanna use the quadiatric formula for this question? @ihateschool18

Answer 36

Because we factored for part B it says in part C "Solve 2x2 -12x + 5 = 0 by using a method different from the one you used in Part B" so you cant use factoring to solve again

Answer 37

oh.. Yes but why would this be the best method?

Answer 38

Im not saying it would be the best really..I just find this the easiest. You can use whatever method you feel comfortable with

Answer 39

Okay thanks!

Answer 40

Welcome!