Tutor.com Quadratic Equations Session

May. 15, 2012

  • Poor
  • Fair
  • Average
  • Good
  • Excellent
  • Click to rate this Poor
  • Click to rate this Fair
  • Click to rate this Average
  • Click to rate this Good
  • Click to rate this Excellent


Session Transcript - Math - Algebra, 3/21/2012 6:29PM - Tutor.comSession Date: 3/21/2012 6:29PM
Length: 16.5 minute(s)
Subject: Math - Algebra


System Message
[00:00:00] *** Please note: All sessions are recorded for quality control. ***

Guest (Customer)
[00:00:00] 5m^2-3m-15=0

Lorie H (Tutor)
[00:00:08] Welcome to Tutor.com . My name is Lorie. How are you?

Guest (Customer)
[00:00:35] great thanks

Lorie H (Tutor)
[00:01:05] I think I was just working with you. Are you supposed to use the quadratic equation to solve this?

Guest (Customer)
[00:01:14] yes! haha

Lorie H (Tutor)
[00:01:42] Okay, let me put up what we had...the equation and quadratic formula

Guest (Customer)
[00:01:46] ok

Lorie H (Tutor)
[00:02:42] First of all, let's identify what a, by and c are... do you know what a is?

Guest (Customer)
[00:02:57] 5

Lorie H (Tutor)
[00:03:13] Right!
[00:03:16] What is b?

Guest (Customer)
[00:03:49] -3

Lorie H (Tutor)
[00:04:07] And, finally, what is c?

Guest (Customer)
[00:04:43] -15

Lorie H (Tutor)
[00:05:14] Great!
[00:05:33] So, we need to put each of those numbers into our quadratic equation where it asks for them.
[00:05:37] Can you do that?

Guest (Customer)
[00:07:11] sure
[00:07:32] i actually have an answer
[00:07:42] well... i did almost all the proble

Lorie H (Tutor)
[00:07:48] Okay...what is your answer?
[00:07:59] That's okay!

Guest (Customer)
[00:07:59] then i got stuck at 3+/-^-291

Lorie H (Tutor)
[00:08:26] Okay...there is a small problem there...let's look at it.

Guest (Customer)
[00:09:16] ok

Lorie H (Tutor)
[00:09:21] That is how you started, right?

Guest (Customer)
[00:09:32] yes

Lorie H (Tutor)
[00:09:54] Now, here is where the signs get a bit tricky.
[00:10:13] 4 times 5 times -15 is -300...right?
[00:10:51] That means we are actually not going to have -291 under the square root sign.
[00:10:56] What will we have instead?

Guest (Customer)
[00:11:22] ohh i messed up with the -15
[00:11:41] so 309

Lorie H (Tutor)
[00:11:47] Right!

Guest (Customer)
[00:12:12] ok

Lorie H (Tutor)
[00:12:22] So, that is what you needed to have your answer correct.
[00:12:41] Any questions over this problem?

Guest (Customer)
[00:13:11] nopee
[00:13:17] do u know the final answer

Lorie H (Tutor)
[00:13:43] Well, it depends if you can leave the final answer in this form, or if you need decimals.
[00:13:55] Were there directions on that?

Guest (Customer)
[00:14:12] no
[00:14:16] just round to hundreth

Lorie H (Tutor)
[00:14:46] Okay, so you need to do decimals (that is what round to the hundreth means)...round to two decimal places.
[00:15:00] Do you have a calculator to do this? You will have two answers.

Guest (Customer)
[00:15:22] yess
[00:15:37] i got 2.06&-1.46

Lorie H (Tutor)
[00:15:47] You are correct!
[00:15:49] Great job!

Guest (Customer)
[00:15:56] yay
[00:15:57] one more?

Lorie H (Tutor)
[00:16:08] Since we have finished this question and there are students waiting, it would be best if you log back on and connect to another tutor to ask your next question.
[00:16:21] Thanks for using Tutor.com. Please fill out the survey as you leave so we can learn how we can better help you in the future! 

Guest (Customer)
[00:16:23] fineee