Algebra

cannabineer

Ursus marijanus
Hehe....let's see how smart T&T is...

6 - 6 * 6 = x

Solve for x.
my answer is negative 46650

(I remember an old notation that 6*6 is six to the sixth power)
(and that is 46656)
don't ask me how I know that.
Don't drop the toothpicks around me ... ;)
cn
 

Ballsonrawls

Well-Known Member
12x(3)-27x(2)-27x. i factor the x out then after that im stuck, an explanation as to how to figure it out would be wonderful. also 54a(2)-9a-30. same thing i factor out the three. is there a way to figure out for the second number? i know you multiply the first and last number, or you find what multiplies together to get the last, then you add them to get the second.
 

curious2garden

Well-Known Mod
Staff member
Annie!! you're need in TnT stat
I'm thinking CN's help is more 'helpful' here than anything I can offer. LOL

But I will say this about his post. He needs to get graphing and using the quadratic formula. He also needs to stop using parends for a caret (what should be used for power).

If he wants my help I need to know more than a simple equation. I need to know what's the point of the lesson. I can guess and to me it looks like he's just trying to dash through some type of algebra review and he's just guessing and slashing. It won't work and it just wastes time.
 

Ballsonrawls

Well-Known Member
oh my bad. the lesson is factoring trinomials. i did all the homework apart from three problems. two of which i had posted
 

curious2garden

Well-Known Mod
Staff member
12x(3)-27x(2)-27x. i factor the x out then after that im stuck, an explanation as to how to figure it out would be wonderful. also 54a(2)-9a-30. same thing i factor out the three. is there a way to figure out for the second number? i know you multiply the first and last number, or you find what multiplies together to get the last, then you add them to get the second.
You need to start graphing. Go here and put in the cubic (third order polynomial). You'll see there will be three answers as it crosses the x axis three times. With your first equation you factor out one X. That gives you X = 0 as one root and as you can see by the graph.

Screen Shot 2013-08-19 at 6.51.53 AM.png

Then you can simply complete the square, factor or use the quadratic equation to solve the remaining two roots.

For your second equation it's a simple quadratic you simplify the coefficients and then use a method to solve as above.

Always put your answers back in as a sanity check.
 

Ballsonrawls

Well-Known Member
damn okay, i hate graphing and i havent been doing it in class yet. we just learned today about quadratic equations. thank you
 

Ballsonrawls

Well-Known Member
im not sure. is that the online portion of the book? because if it is i am not, lol. its elayn martin gay i think is the writer, and im not sure what the edition is. they have one specifically for my college, but there is another edition that is the same. cant find a legitimate torrent for the book. waiting on financial aid so i can purchase it, but until then... falling behind even a lesson sucks ass.
 

curious2garden

Well-Known Mod
Staff member
im not sure. is that the online portion of the book? because if it is i am not, lol. its elayn martin gay i think is the writer, and im not sure what the edition is. they have one specifically for my college, but there is another edition that is the same. cant find a legitimate torrent for the book. waiting on financial aid so i can purchase it, but until then... falling behind even a lesson sucks ass.
There used to be a copy of every text book at the college library. Go there and xerox the chapters ahead until you can get the book. Today in this age of digitization just scan the darn book.

Further other than for the getting the assigned exercise you don't have to have their algebra book. Algebra is algebra just download 2 or 3 algebra texts and start reading the topics you are working.
 

vacpurge

New Member
LOL how did you do in math? How far did you go?
see post number #14 ;)

im not the best at finding crazy algebra stuff like you (its been 7 or so years since ive thought of it) ... but as for doing it in my head ex: 83 x 15: I can figure out pretty damn quick... almost instantly can get it + or - 50 or so just by looking at the two numbers. I can tell right now its around 1200 or 1300 (8 x 1.5 is 12)then just go from there and fine tune it to get the exact answer.

83 x 10 is 830
83 x 5 is half.. which is 415

add them together real quick and its 1245.... did it in my head in under 2 seconds (faster than my old lady gets out her phone, clicks calc app, and types it in)

I like numbers... theyre my thing. not over ridiculous algebra though, I dont use that.
 

vacpurge

New Member
Yes I remember that post. I was just curious how far you went in formal math classes, that's all :)
I got grade 12 math 30 (I think thats what it was) as well as a journeyman pipefitter ticket which took about another year of secondary schooling at a trade school. no algebra though. tons of science and physics though + a little added math... now that stuffs cool.
 
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