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Mathematics 15 Online
OpenStudy (anonymous):

3m^2 + 11x – 4 Help please

OpenStudy (anonymous):

3(m )(m )

OpenStudy (luigi0210):

Are we factoring?

OpenStudy (anonymous):

yeah

OpenStudy (anonymous):

I can't find the 2 numbers):

OpenStudy (anonymous):

Can someone please help me?

OpenStudy (luigi0210):

Well break up into two equations, but keep the 3 with the x

OpenStudy (anonymous):

so like I did a bit ago? 3(m )(m ) ?

OpenStudy (anonymous):

):

OpenStudy (anonymous):

I can help :)

OpenStudy (anonymous):

Thank you!

OpenStudy (luigi0210):

Btw you can always use the quadratic formula

OpenStudy (anonymous):

It just doesn't make much sense to me):

OpenStudy (anonymous):

Alright- First step is quadratic formula. Have you heard of this?

OpenStudy (anonymous):

yup!

OpenStudy (anonymous):

We want to make a box that looks like the following:

OpenStudy (luigi0210):

You can factor without it though @Lagoonabarbie

OpenStudy (anonymous):

I just don't get how I can find the two numbers using the quadratic formula... not the best at math, sorry

OpenStudy (anonymous):

Okay. Since quadratic formula is very important to know, I will show you it that way. Just stay on this chat it might take a few minutes to show you the steps for this problem.

OpenStudy (anonymous):

ok...

OpenStudy (anonymous):

First, you need to use the two numbers- They are 3, (Which I get from 3m^2), and -4, which I get from the last part of the equation. We are going to be using -12, (The product of -4 and 3)

OpenStudy (anonymous):

use those numbers for what?

OpenStudy (anonymous):

I'm sorry. We want to use 11. Not 4.

OpenStudy (anonymous):

I'm drawing it. One minute! :)

OpenStudy (anonymous):

So- How can we get two of the same numbers that multiply to 33, and add to 11?

OpenStudy (anonymous):

|dw:1377733470820:dw|

OpenStudy (anonymous):

The 33 comes from the 3 (in the 3m^2), and the 11 comes from the (11x)

OpenStudy (anonymous):

I tried to solve it and I just couldn't do the formula, my calculator said error...

OpenStudy (anonymous):

oh ok, i see what youre doing

OpenStudy (anonymous):

|dw:1377733505411:dw|

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