Question 764954
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
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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
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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
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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
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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
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Sorry not sure what GCF was for on Q 4 & 5
but, I hope this helps you.
:-)