Introduction to Quadratic Equations

This is the start of a small series on solving quadratic equations. This is video 32 of 51 in the solving equation series. The next three series are "Word Problems", "Factoring" and "Graphing".

Category:

Howto & Style

Tags:

• mathematics
• equations
• solving
• series

[RosserD18]

8n=2

n=8/2

n=4...?

[minkusbc]

I don't understand your comment. if 8n=2 then n= 2/8 not 8/2.

Therefore n = 1/4 or 0.25, not 4.

[VCotto27]

I wish you were my actual teacher. :)

You explain it alot better.

[wjv4me]

Very cool...keep on helping us!

[SyNtzz16]

how did you get 25?!

[GUITARxxLEGEND]

im lost without sound :O

[weatherman1994]

@Alize101586 It does not matter which side you set to zero. I personally prefer to keep the quadratic term positive. (It's just a quirky thing I do.) In that case, you would have 0=x^2+3.64x+4 and, from there, use the quadratic formula. Check your sign conventions when you do this. (I can't tell you how many people forget that the opposite of a negative is positive.)

[Alize101586]

I'm doing a chem problem where we need to use this formula, finding equlibrium concentrations.

0.36=(2x)^2/(0.0250-x)

I end up with 0.36x=4+4x+x^2

Now, I need to set this equal to zero right? So, does it matter then which way I move things? Am I supposed to move everything on the right to the left or vice versa? The reason I'm asking because I keep getting wrong answers :(

[mikooou]

no sound :(

[aljonloveiguibone]

@RosserD18 makes me laugh

[keviously]

adding the &fmt=18 did not work for me, neither did constant refreshing. can follow along until 2:30ish where I really could do with sound. Looked interesting though.

[GamerX299]

@kingofdice66 just add &fmt=18 at the end of the link and it'll fix

[kingofdice66]

majority of your videos lacks sound

[wierdo963]

lmfao.. i did this in 8th.. grade... and that stuff was soooo easy... even tho our tests were 9th grade level...