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Rashid [163]
3 years ago
8

Which polynomial is factored completely?

Mathematics
2 answers:
astraxan [27]3 years ago
6 0
G^5 -g = g(g^4 -1)=g(g^2 -1)(g^2 +1) = g(g-1)(g+1)(g^2 +1)

24g^2 -6g^4 = 6g^2(4 -g^2) = 6g^2(2 -g)(2 +g)
Zina [86]3 years ago
5 0

Answer:

The polynomial which is factored completely is  2g^2+5g+4 as these are not further factored.        

Step-by-step explanation:

To find : Which polynomial is factored completely?

Solution :

We factor the given polynomial one by one,

1) g^5-g

g^5-g=g(g^4-1)

g^5-g=g(g^2-1)(g^2+1)

g^5-g=g(g-1)(g+1)(g^2+1)

2) 4g^3 + 18g^2+20g

4g^3 + 18g^2+20g=2g(2g^{2}+9g+10)

4g^3 + 18g^2+20g=2g(2g^{2}+5g+4g+10)

4g^3 + 18g^2+20g=2g[g(2g+5)+2(2g+5)]

4g^3 + 18g^2+20g=2g(2g+5)(g+2)

3) 24g^2 - 6g^4

24g^2 - 6g^4=6g^{2}(4-g^{2})

24g^2 - 6g^4=6g^{2}(2-g)(2+g)

4) 2g^2+5g+4

This expression is can not be factored with rational number as

D=b^2-4ac\\D=5^2-4(2)(4)\\D=25-32\\D=-7

Discriminant D<0 so there is no rational roots.

So, The polynomial which is factored completely is  2g^2+5g+4 as these are not further factored.

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==================================================

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