# Math Help - still working on poly

1. ## still working on poly

(3x2-5x +7) +(x2 +2x -1)
=(3x2 +x2) (-5x + 2x) (7 -1)
=(4x2) (-3x) (7)
Why does (7 -1) =7 and not 6
and what word do I use to raise my 2 tosquare or to the power of

2. Originally Posted by Leona_Marie
(3x2-5x +7) +(x2 +2x -1)
=(3x2 +x2) (-5x + 2x) (7 -1)
=(4x2) (-3x) (7)
Why does (7 -1) =7 and not 6
and what word do I use to raise my 2 tosquare or to the power of
that should be 4x^2 -3x +6 and not 7.
you can use this symbol ^

3. Originally Posted by Leona_Marie
(3x2-5x +7) +(x2 +2x -1)
=(3x2 +x2) (-5x + 2x) (7 -1)
=(4x2) (-3x) (7)
Why does (7 -1) =7 and not 6
and what word do I use to raise my 2 tosquare or to the power of
You have a sum of two sums. The brackets are not necessary here:

$(3x^2-5x+7)+(x^2+2x-1)=3x^2+x^2-5x+2x+7-1 = 4x^2-3x+6$

4. Originally Posted by princess_21
that should be 4x^2 -3x +6 and not 7.
you can use this symbol ^
I also thought it was 6 but I use this web sight to taech myself,and 7 was the answer I was given. I know how to use 4x^2, but I would rather use
4x2 meaning 4x times 2 is different than 4x squared by 2. I just wanted to know which font I would use to make a small 2 above the x.

5. Originally Posted by princess_21
that should be 4x^2 -3x +6 and not 7.
you can use this symbol ^
I understand what you were saying now, duh sometimes I go cwazy

6. Originally Posted by Leona_Marie
I also thought it was 6 but I use this web sight to taech myself,and 7 was the answer I was given. I know how to use 4x^2, but I would rather use
4x2 meaning 4x times 2 is different than 4x squared by 2. I just wanted to know which font I would use to make a small 2 above the x.
it is better to try factoring rather than relying on websites.
you should try so you can practice.

7. Originally Posted by princess_21
it is better to try factoring rather than relying on websites.
you should try so you can practice.
I'd like to do a little factoing. first I have to learn how.