Question

Simplify (4x^2+ 12x – 9) + (7x^2– x + 3)
Simplify (4x^2+ 12x – 9) + (7x^2– x + 3)
@Mathematics

Answer 1

11x^2+11x-6

Answer 2

4x^2+12x-9+7x^2-x+3
4x^2+7x^2+12-x-9+3
11x^2+19x-6

Answer 3

http://patrickjmt.com/polynomials-adding-and-subtracting/

Answer 4

Oops sorry typo... it's 11x^2+11x-6..

Answer 5

(4+7)x^2+(12-1)x+(-9+3)
11x^2+11x-6

Answer 6

No offense, but Patrick's methodology is a little off.

Answer 7

umm how?

Answer 8

Well, for one, he EXPLAINS certain steps WITHOUT actually showing EACH algebraic step. It shouldn't be allowed, but many people get away with it.

Answer 9

as in?

Answer 10

I think his work is fine, and obviously universities such as Vanderbilt and Louisville also believe

Answer 11

I don't need to get into specifics. If you can't see it, then you must have had the same kind of teacher. His Discrete Math section is a joke.

Answer 12

Do you have a major in math?

Answer 13

You're not qualified to ask me that question.

Answer 14

I'm just wondering as you seem to want to point out others flaws that have excelled beyond just taking classes and being an undergrad

Answer 15

Things aren't not always as simple as that man. If people didn't critique others, the world would be in much worse shape than it already is. Nobody's perfect.

Answer 16

Hero, you seem overly defensive :X

But yeah. criticism allows us to move forward.

Answer 17

Yes but people that have Majored and gotten their degrees have gone extensively into Mathematics so to say someone that is a teacher at the university level is "Not teaching it the right way" is kind of saying "YES You understand math more than me, but I still think your concepts are wrong"

Answer 18

there's a difference in taking math classes during your college undergraduate years and actually going for A masters in mathematics

Answer 19

Outkast, you speak as if you're talking to your son. I'm fully aware of my own situation. I don't need anyone to describe my situation. You clearly don't understand my point of view. I know you want to defend Patrick, but there's no need to man. You're not him.

Answer 20

I'm not just defending him. I'm defending any teacher that gets scrutiny from people below their levels of expertise. You have no right to say whether their teachings are wrong, until you've been in their situation and as far as i know, you are not a mathematics teacher at a university. Sure some kids can say well the way you teach it is more difficult to understand but you are literally nitpicking on his steps as if you are the teacher and he's the undergrad

Answer 21

Once you are a teacher, go ahead but dont scrutinize others teaching when you are not a teacher yourself

Answer 22

You're not a teacher yourself and then you tell me what I should and shouldn't do. And you claim that I'm the one crossing boundaries...

Answer 23

I've taught undergrads, and I didn't even watch it :)
There are lots of ways of instructing things like this--and it really depends on your audience how you do so...

Answer 24

I don't care who a person is. If I observe them doing something that isn't right, I'm going to say something.

Answer 25

Here's an example of why you should open your mouth, even if it's a doctorate teaching a course. One day, I was in class and a doctorate level instructor was teaching a course. They made an obvious mistake in presenting material and there were people in the room who were just seeing the material for the first time. If I hadn't said something and just let "the one who is above me" keep going without questioning their technique, those who were just trying to understand the material would have been further confused than they already were and would have missed crucial information for understanding the material. Side note: The instructor made several presentation mistakes throughout the course. No one spoke up except me. I saved countless students from confusion. That's why I'm a Hero and others are outkasts.

Answer 26

^ lol at the last sentence.

Answer 27

You just like to belittle everyone you can don't you? Anyways, Speaking up about a mistake is completely different than telling a teacher they aren't teaching right. Simple mistakes such as forgetting a + or - or making a mistakes. Everyone can make mistakes- No one is perfect. However, You do not tell your teacher "excuse i believe you're teaching this subject wrong"

Answer 28

To say something makes you look ignorant. point out certain concepts, notice mistakes, however you don't tell your teacher that she is wrong at what she does for a living

Answer 29

To say something about wrongful teaching makes you ignorant* the other stuff such as pointing out errors or distinguishing concepts are fine,but i believe you should never tell your teacher your are bad at what you studied for and i could teach it better (which is essentially what you are saying if you think it isn't correct)

Answer 30

This is the last thing, I will say....
Everyone makes mistakes (including teaching mistakes) Nobody, I repeat, nobody is perfect. And there does exist such students who believe that although the steps are right, the approach to teaching the subject may not be very sound. It's not about "ignorance". It's about observation and making statements based on those observations, which is essentially what I did.