A large bag contains 7/12 pound of nails. How many 1/6 -pound bags can be filled with this amount of nails?

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Ответ:

leomessifanboy678

16.04.2022

Mathematics

f(x)= x^2(x+9i)(x-9i)

Step-by-step explanation:

f(x) = x^4 + 81x^2

Lets factor GCF x^2

f(x) =x^2(x^2+81)

Now factor out x^2+81

LEts find out factors by solving, set the parenthesis =0 and solve for x

x^2+81=0

Subtract 81 on both sides

x^2=-81

take square root on both sides

$x^2=\sqrt{-81}$

$\sqrt{-1} =i$

$x=i\sqrt{81}$

x=+-9i

Two roots are x=-9i , x=+9i

Factors are (x+9i)(x-9i)

So f(x)= x^2(x+9i)(x-9i)

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