anonymous
  • anonymous
3m^2 + 11x – 4 Help please
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
3(m )(m )
Luigi0210
  • Luigi0210
Are we factoring?
anonymous
  • anonymous
yeah

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anonymous
  • anonymous
I can't find the 2 numbers):
anonymous
  • anonymous
Can someone please help me?
Luigi0210
  • Luigi0210
Well break up into two equations, but keep the 3 with the x
anonymous
  • anonymous
so like I did a bit ago? 3(m )(m ) ?
anonymous
  • anonymous
):
anonymous
  • anonymous
I can help :)
anonymous
  • anonymous
Thank you!
Luigi0210
  • Luigi0210
Btw you can always use the quadratic formula
anonymous
  • anonymous
It just doesn't make much sense to me):
anonymous
  • anonymous
Alright- First step is quadratic formula. Have you heard of this?
anonymous
  • anonymous
yup!
anonymous
  • anonymous
We want to make a box that looks like the following:
Luigi0210
  • Luigi0210
You can factor without it though @Lagoonabarbie
anonymous
  • anonymous
I just don't get how I can find the two numbers using the quadratic formula... not the best at math, sorry
anonymous
  • 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.
anonymous
  • anonymous
ok...
anonymous
  • 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)
anonymous
  • anonymous
use those numbers for what?
anonymous
  • anonymous
I'm sorry. We want to use 11. Not 4.
anonymous
  • anonymous
I'm drawing it. One minute! :)
anonymous
  • anonymous
So- How can we get two of the same numbers that multiply to 33, and add to 11?
anonymous
  • anonymous
|dw:1377733470820:dw|
anonymous
  • anonymous
The 33 comes from the 3 (in the 3m^2), and the 11 comes from the (11x)
anonymous
  • anonymous
I tried to solve it and I just couldn't do the formula, my calculator said error...
anonymous
  • anonymous
oh ok, i see what youre doing
anonymous
  • anonymous
|dw:1377733505411:dw|
anonymous
  • anonymous
but why 33?
anonymous
  • anonymous
Under the 33, you want to find two numbers that multiply to 33, AND the same numbers have to ADD to 11.
anonymous
  • anonymous
33 comes from
anonymous
  • anonymous
3 x 11
anonymous
  • anonymous
comes from the 3, yeah but why times 11?
anonymous
  • anonymous
|dw:1377733600048:dw|
anonymous
  • anonymous
That is just the way you solve the problem :)
anonymous
  • anonymous
|dw:1377733648841:dw|
anonymous
  • anonymous
so a times b?
anonymous
  • anonymous
So- Looking back on the picture I just posted, can you find two of the same numbers that multiply to 33, and add to 11?
anonymous
  • anonymous
And- Correct. A x B. Exactly
anonymous
  • anonymous
no, i cant figure it out...
anonymous
  • anonymous
Exactly! That means, there is no solution! It is impossible.
anonymous
  • anonymous
so it's trying to trick me or something?
anonymous
  • anonymous
Nope! A lot of times in math they throw in those 'No Solution' problems.
anonymous
  • anonymous
Let me check my work before you close the problem..
anonymous
  • anonymous
So do I just say "no solution"?
anonymous
  • anonymous
and ok
anonymous
  • anonymous
Don't write it yet.
anonymous
  • anonymous
The math in one of the steps is incorrect. I will upload a picture of my new work in one moment.
anonymous
  • anonymous
but does the answer stay the same?
anonymous
  • anonymous
Not quite.
anonymous
  • anonymous
There will be an answer, actually. It will look something like: (3x-2)^2
anonymous
  • anonymous
huh...?
anonymous
  • anonymous
calculator says "no solution" ...
anonymous
  • anonymous
I'm sorry. The answer is no solution. Sorry to keep you waiting. I just had to double check. :) Good luck!!
anonymous
  • anonymous
no worries, thank you for helping me!
anonymous
  • anonymous
Sure!

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