Geometry of Triangles

[thorn94]

It's been years since I took trig but couldn't you factor: 6x^2 + 12x -144 = 0 then solve for x?

if you simplify it
x^2 + 2x -24=0
then factorise
(x-4)(x+6)
let each equal 0
x-4 =0 x+6=0
x=4 x=-6

2(4)^2 -7
32-7
25

2(-6)^2 -7
72-7
65

r is less than 90 so r=25 degrees



i think thats right

EDIT:there was a typo in the first line jarrhead woops. still the right answer tho

 

[jarrhead]

I understand quadratics now! hahaha.
Thanks thorn!

 

[jarrhead]

It was correct. It was choice C.

I have nothing to repay the favor though!

 

[thorn94]

I understand quadratics now! hahaha.
Thanks thorn!

no probs
just needed any excuse to stop doing my biology homework

 

[A-Step-Towards]

OK i have been thinking about this i mean i just took a test on it use this formula below.

Your equation is 6x^2 + 12x - 144 = 0
a=6, b=12, and c=-144

now plug these numbers in where needed in the equation below. EDIT appears you got it another hmmm i dunno if this problem would work with these equation but i aint solving it for "fun" haha

 

[elgecko]

(2X + 12) (3x - 12) = 0

 

[jarrhead]

A-Step, I think that's only for Quadratic Equations of Lines.

B being the y-intercept.
X being... well.. X
And I dont remember what a and c were, but I used to be really good at those.

 

[thorn94]

OK i have been thinking about this i mean i just took a test on it use this formula below.

Your equation is 6x^2 + 12x - 144 = 0
a=6, b=12, and c=-144

now plug these numbers in where needed in the equation below. EDIT appears you got it another hmmm i dunno if this problem would work with these equation but i aint solving it for "fun" haha

that works but its quicker if you factorise it

 

[Disraeli Gears]

Just realized you can factor out a 6 from the original equation and make it a LOT easier to factor. 6(x^2 + 2x - 24) = 0 should factor to (6)(x-4)(x+6)=0 making x = {-6,4}.

EDIT: Nevermind, looks like you guys have got it covered

 

[username n/a]

Umm... S+T=Q

 

[jarrhead]

Why 6? GCF of 6 and 18?

 

[jarrhead]

Just realized you can factor out a 6 from the original equation and make it a LOT easier to factor. 6(x^2 + 2x - 24) = 0 should factor to (6)(x-4)(x+6)=0 making x = {-6,4}.

EDIT: Nevermind, looks like you guys have got it covered

Wrong quadratics? No coordinates here, man. Just angle measurements. X is a value for part of an angle measurement

 

[Disraeli Gears]

A-Step, I think that's only for Quadratic Equations of Lines.

B being the y-intercept.
X being... well.. X
And I dont remember what a and c were, but I used to be really good at those.

Nah, it works for any quadratic equation (also, quadratic equations and linear equations are 2 seperate things). You may be thinking of y = mx + b, which is one form of a linear equation.

Wrong quadratics? No coordinates here, man. Just angle measurements. X is a value for part of an angle measurement

Not talkin' coordinates- {} brackets are used to discuss a set of values for x (in this case only 1 will apply since the other will make negative angle measures), while () parenthases are ordered pairs. I'm basically saying x = -6 and 4.

 

[A-Step-Towards]

that works but its quicker if you factorise it

Thats true i just started college i need to learn these tricks cuz math last term was a b*tch.

 

[elgecko]

r is less than 90 so r=25 degrees



i think thats right

EDIT:there was a typo in the first line jarrhead woops. still the right answer tho

I concur!

 

[jarrhead]

EDIT:there was a typo in the first line jarrhead woops. still the right answer tho

I didn't even read the first line. i read "factorize," "(x + y)(x-z)" and the answer.

 

[A-Step-Towards]

if you ever run into problems people at this forum are really cool! i am a member its like TB but for math.

http://www.mathhelpforum.com/math-help/

 

[jarrhead]

Sounds nerdy.

 

[elgecko]

if you ever run into problems people at this forum are really cool! i am a member its like TB but for math.

http://www.mathhelpforum.com/math-help/

That's like shooting fish in a barrel. It's way more fun giving a bunch of bass players a stab at it

 

[Disraeli Gears]

That's like shooting fish in a barrel. It's way more fun giving a bunch of bass players a stab at it

Or you could have some REAL fun and take it over to a drummers' forum .