Question

need help with a couple of algebra questions.
Will fan and Medal!

Answer 1

@JoannaBlackwelder

Answer 2

Ok, what are your questions?

Answer 3

9x^2 - 16x + 60 = 0
Part A: Describe the solution(s) to the equation by just determining the radicand. Show your work. (3 points)

Answer 4

how do you determine the radicand?

Answer 5

That is the part in the quadratic equation that is under the radical. b^2-4ac

Answer 6

so you would just plug in and solve?

Answer 7

Yep. If the radicand is positive, that means that the solution(s) will be two real solutions.

Answer 8

If it is 0, then the solution is one real solution.

Answer 9

And if it is negative, there will be two imaginary solutions.

Answer 10

So, what do you get?

Answer 11

Hm, that's not what I get. Check your signs.

Answer 12

I will show you my work

Answer 13

Sure :-)

Answer 14

9x^2-16x+60=0
-16^2-4(9)(60)
-16^2-4(540)
256-2160
-1904

Answer 15

Yep, that's what I get. :-)

Answer 16

So, what type are the solutions?

Answer 17

ok, so that would be the radicand?

Answer 18

Yep

Answer 19

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)

Answer 20

I chose to solve by completing the square but I forgot how to solve it can you help?

Answer 21

I have a really bad memory:(

Answer 22

Hm, you can do it that way, but I think the quadratic formula would be easier.

Answer 23

ok

Answer 24

I am looking at the steps from this link http://assets.openstudy.com/updates/attachments/5567650be4b01de5673a8a96-vocaloid-1432844914043-screenshot20150528at4.28.10pm.png

Answer 25

would it be okay if I had a negative for c instead of a positive?

Answer 26

are you still there?

Answer 27

At that link, you just need the step on the bottom right. The rest is deriving the formula.

Answer 28

oh ok

Answer 29

And any of the terms can be positive or negative :-)