6x^2+5-4=

- anonymous

6x^2+5-4=

- jamiebookeater

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- Directrix

What are the instructions for the posted problem?

- anonymous

its factoring diamond

- Directrix

There's an x missing here, I think --> 6x^2+5-4= --> after the "5."
I don't know the diamond technique. I can factor by grouping.

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## More answers

- anonymous

yeah factor by grouping :)

- Directrix

6x^2 +5x -4
What are two numbers that multiply to -24 AND add to 5 ?

- anonymous

2?

- anonymous

i think e. e

- anonymous

ithink anyways i have the other side of it.. its (2x-1)( )

- Directrix

Okay. What number times -1 will multiply to -4.
-1*? = - 4 ? Help me out a little bit, and I can help you finish this. Okay?

- anonymous

1

- Directrix

-1 * 1 = -1 so that is not it.

- anonymous

1 can multiply -4

- anonymous

no wait wat?? i need to find a number that can multiply by 4?

- Directrix

Yes, so -1 times 4 = -4 which means
6x^2 +5x -4 = (2x-1)( ? +4 )
We're almost there. (2x) times what equals 6 x^2 ?

- anonymous

3x?

- anonymous

so its 3x-4?

- Directrix

Let's see if it works:
6x^2 +5x -4 = (2x-1)( 3x +4 ) ?? @chubbytots What do you think?

- anonymous

yep its right actually im answering a puzzle e. e

- anonymous

that's right @Directrix

- anonymous

\[3x^2-11x-20=\]

- Directrix

>>so its 3x-4?
I did not get that.

- anonymous

its 3x+4

- anonymous

for da first group and the second group is?

- Directrix

(2x-1)*(3x-4) multiplies to 6x^2 -11x + 4 which is not the given problem.

- Directrix

Okay, let's try that.

- anonymous

6x^2 -11x + 4=(2x-1)(3x+4)

- Directrix

(2x-1)*(3x+4) = 6x^2 -3x + 8x -4 = 6x^2 + 5x - 4.

- anonymous

thats da second question and da second question is \[3x^2-11x-20=(3x+4)( ? )\]

- anonymous

i mean third**

- Directrix

I only saw the first problem.

- anonymous

i need the third problem cuz this is a pzzle v. v

- Directrix

3x^2 -11x - 20 = (3x+4) * ( )
What times 3x is equal to 3 x^2 ?

- anonymous

4x+3?

- Directrix

3x^2 -11x - 20 = (3x+4) * (x )

- Directrix

3x times 4x = 12 x^2 -->doesn't work

- anonymous

is it positve 3?

- Directrix

3x times 3 = 9x.

- anonymous

yes

- Directrix

Oh, you mean ( x + 3) as the second factor?

- anonymous

yes

- Directrix

(3x+4) * (x + 3 ) = 3x^2 -11x - 20 ??
3x^2 + 9x + 4x + 12 Nope.

- Directrix

We could guess forever.

- anonymous

xDD i think lol and another one :O

- Directrix

Here is where we are: 3x^2 -11x - 20 = (3x+4) * (x )
We have to get -20 for the last term.
4 times what equals - 20 ?--->

- anonymous

i think its x-3?

- Directrix

4 times - 3 is not -20.

- anonymous

i mean 2?

- anonymous

i mean 5 sorry :o

- Directrix

4 times 5 is close but 4 times 5 does not equal -20

- anonymous

hmmmm

- anonymous

i think we need to make one of them a negative right?

- Directrix

Yes.

- anonymous

so-5?

- Directrix

Yes

- anonymous

its x-5?

- Directrix

3x^2 -11x - 20 = (3x+4) * (x - 5 )

- Directrix

That works.

- anonymous

yes

- anonymous

\[6x^2+11x-10=(2x+5)(?)\]

- Directrix

It's your turn to do this one. :) You come up with the factors, and I will check.

- anonymous

i'll be guessing dou

- Directrix

That's what I ended up doing because you didn't like factoring by grouping.

- anonymous

2x+1

- anonymous

lol actually this s factoring by grouping.. and i need to do factor diamond

- anonymous

its like two steps first is factoring by grouping and factoring diamond

- Directrix

That diamond thing is sophisticated guessing for me.

- anonymous

x. x so can we do factoring by grouping?

- Directrix

(2x+1)*(2x+5) = 4x^2 + 12x + 5 --> This is from your guess.

- Directrix

It didn't work.

- anonymous

2x-5?

- Directrix

I'm going to group.

- anonymous

is it 6x10?

- anonymous

6x10=60 ryt and wet going to make one of them a negative?

- Directrix

6 + 10 is not 11

- Directrix

15 and -4.

- Directrix

x^2 + 11x - 10 = x^2 + 15x - 4x - 10

- anonymous

5x+2?

- Directrix

This thread is so long that I have lost the problem.

- Directrix

(2x + 5) * ( 3x + 2)
That is my last factoring problem on this puzzle.

- anonymous

so its 3x+2?

- anonymous

3x-2?

- Directrix

6x^2 + 15x - 4x - 10 = 3x(2x + 5) - 2(2x + 5) = (2x + 5) * ( 3x - 2).
Right.

- anonymous

owoo that was brain storm >,<

- Directrix

The more of this stuff you do, the better you get. Except, I seem to be getting worse.

- anonymous

ohh yah sure cuz when im learning this i was lazy thats why i came up here >.<

- Directrix

What is the next factoring problem?

- anonymous

how abut this?
\[7x^2+13x-2=(x+2)(?)\]

- anonymous

xDD under the typing box thou
v
v
v
v
v

- anonymous

actually this factoring group so on this is the new lesson on our school e. e''''

- anonymous

and imto lazy about it

- anonymous

xDD uhh nope o. o

- anonymous

ohh well i better rap dis up cuz im gonna go early tommorow well thanks fo the help :)

- Directrix

Okay. See later on here.

- anonymous

ok byee

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