SOLUTION: I have a few problems and I'm hoping someone can help....i've probably done too much homework in the past couple of day, and now the simple ones are the problem for me! LOL Her

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: I have a few problems and I'm hoping someone can help....i've probably done too much homework in the past couple of day, and now the simple ones are the problem for me! LOL Her      Log On


   

Question 764954: I have a few problems and I'm hoping someone can help....i've probably done too much homework in the past couple of day, and now the simple ones are the problem for me! LOL
Here they are:
Question 1:
(-8x^3+x-3)+(2x^3+x^2)-(4x^2+3x-1)
Question 2:
what is the product of (m-n+k)(m+2n-3k)
Question 3:
(k-y+3m)^2
Question 4:
using GCF
2(m-1)-3(m-1)^2+2(m-1)
Question 5:
Using GCF
5(a+3)^3-2(a+3)+(a+3)^2
I've done about 50 questions so far....I'm shot...The answers are probably right in front of me!
Any help you give me would be greatly appreciated. I'm going to take a break and enjoy the rain for a little bit! Thanks a bunch!

Found 2 solutions by MathLover1, Cromlix:
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

Question 1:
%28-8x%5E3%2Bx-3%29%2B%282x%5E3%2Bx%5E2%29-%284x%5E2%2B3x-1%29
-8x%5E3%2Bx-3%2B2x%5E3%2Bx%5E2-4x%5E2-3x%2B1
2x%5E3-8x%5E3%2Bx%5E2-4x%5E2%2Bx-3x%2B1-3
-6x%5E3-3x%5E2-2x-2


Question 2:
what is the product of %28m-n%2Bk%29%28m%2B2n-3k%29
%28m-n%2Bk%29%28m%2B2n-3k%29
=m%5E2%2B2nm-3km-nm-2n%5E2%2B3kn%2Bmk%2B2nk-3k%5E2
=m%5E2-2n%5E2-3k%5E2%2Bnm-2km%2B5kn

Question 3:

Question 4:
using GCF
2%28m-1%29-3%28m-1%29%5E2%2B2%28m-1%29+
%28m-1%29%282-3%28m-1%29%2B2%29+
%28m-1%29%282-3m%2B6%2B2%29+
%28m-1%29%2810-3m%29+
Question 5:
Using GCF
5%28a%2B3%29%5E3-2%28a%2B3%29%2B%28a%2B3%29%5E2
%28a%2B3%29%285%28a%2B3%29%5E2-2%2B%28a%2B3%29%29
%28a%2B3%29%285%28a%5E2%2B6a%2B9%29-2%2Ba%2B3%29
%28a%2B3%29%285a%5E2%2B30a%2B45-2%2Ba%2B3%29
%28a%2B3%29%285a%5E2%2B31a%2B46%29



Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
Question 1.
(-8x^3+x-3)+(2x^3+x^2)-(4x^2+3x-1)
-8x^3 + x - 3 + 2x^3 + x^2 - 4x^2 - 3x + 1
-6x^3 - 3x^2 - 2x -2
................................
Question 2
what is the product of (m-n+k)(m+2n-3k)
m^2 + 2nm - 3km - nm - 2n^2 + 3kn + km + 2kn - 3k^2
-2n^2 + m^2 + nm + 5kn - 2km - 3k^2
...................................
Question 3
(k-y+3m)^2
(k - y - 3m)(k - y + 3m)
k^2 - ky + 3km - ky + y^2 - 3my + 3km - 3my + 9m^2
k^2 + y^2 -2ky + 6km - 6my + 9m^2
..................................
Question 4
2(m-1)-3(m-1)^2+2(m-1)
2m - 2 - 3(m^2 - 2m + 1) + 2m -2
2m - 2 - 3m^2 + 6m - 3 + 2m - 2
-3m^2 + 10m - 7
...................................
Question 5
5(a+3)^3-2(a+3)+(a+3)^2
5(a^3 + 9a^2 + 27a + 27) - 2a - 6 + a^2 + 6a + 9
5a^3 + 45a^2 + 27a + 27 -2a - 6 + a^2 + 6a + 9
5a^3 + 46a + 31a + 30
...................................
Sorry not sure what GCF was for on Q 4 & 5
but, I hope this helps you.
:-)