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Mathematics 66 Online
kaylak:

help

kaylak:

i have denominator

Vocaloid:

so after factoring and applying the multiplications I get: (x-4)(x+2) / [x(x+2)(x-2)] + 4(x) / [x(x+2)(x-2)]

Vocaloid:

so then I just add my numerators to get (x-4)(x+2) + 4x ^ now you can start expanding that

Vocaloid:

can you try doing the entire expansion in one comment ^^ it's a little less confusing that way

kaylak:

x^2 -8x 2x

Vocaloid:

you're forgetting about the constant term ^^"

Vocaloid:

remember foil

Vocaloid:

(x-4)(x+2) = x^2 + 2x - 4x - 8 = x^2 - 2x - 8

Vocaloid:

then we just add + 4x to get x^2 + 2x - 8 as the numerator

Vocaloid:

this expression factors out to get (x+4)(x-2) [not the same as the original, the signs are switched]

kaylak:

x^2-2x-8/x^2+2 is answer

Vocaloid:

x^2 + 2 is not the denominator

Vocaloid:

[x(x+2)(x-2)] ^ this is the denominator

kaylak:

oh ok

kaylak:

thank you for your help

Vocaloid:

then we write this out to get (x+4)(x-2) / [x(x+2)(x-2)] notice anything you can cancel out?

kaylak:

there's more lol

kaylak:

x-2

Vocaloid:

good, now we get (x+4)/ [ x * (x+2) ] as our answer

kaylak:

so that's the finl answer

Vocaloid:

remember, you can use mathway to check your answers but your teacher is expecting all of the steps I have shown you

Vocaloid:

that's it

Vocaloid:

anyway I gotta go study for finals, good work today and take care

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