Is this equation right is it worked correctly x 1

Question

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x2-4 x2+4x+4



This is how she simplified it:



x(x2+4x+4) - 1(x2-4)

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(x2-4)(x2+4x+4)



x3+4x2+4x-x2+4

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x4+4x3-16x-16



x3+3x2+4x+4

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x4+4x3-16x-16



1+3x2+1+1

---------

x4+4-4-4



3+3x2

------

x4-4



3+3

-----

x2-4



6

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x2-4

Answer 1

You did not start with an equation.
None of what follows makes sense