Mathematics
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OpenStudy (anonymous):
7w^2+30w+8 = ??
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OpenStudy (anonymous):
(7w + 2)(w + 4)
OpenStudy (anonymous):
30w where is come from ?
hero (hero):
7x^2+30x+8
7x^2 + 28x + 2x + 8
7x(x+4)+2(x+4)
(x+4)(7x+2)
Substiute x for w
OpenStudy (anonymous):
wow .. i love u man ..
hero (hero):
I'm amazed that you understood it
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OpenStudy (anonymous):
its easy .. thx bro
hero (hero):
Okay. Do you have another one?
OpenStudy (anonymous):
27x^6 + 64y^3 = ?
OpenStudy (anonymous):
i dont know .. :\
hero (hero):
I thought it was easy
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OpenStudy (anonymous):
no its not .. ;p
hero (hero):
There is an invisible b term that you have to split it into
OpenStudy (anonymous):
whaaaat !!!!!
OpenStudy (anonymous):
the q is simplify
hero (hero):
yes, that's part of simplification
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OpenStudy (anonymous):
so how can i simplify it ?
hero (hero):
Just a sec
OpenStudy (anonymous):
i think i can do it ..
hero (hero):
Okay, go ahead
OpenStudy (anonymous):
(3x^2)^3 +
what if i say .. let x^2 = y and let g^3 = m
so i have ..
3y^2 + 64m is thay right ?
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hero (hero):
You should probably consult the sum of cubes formula
OpenStudy (anonymous):
but i dont know what after that .. ;p
OpenStudy (anonymous):
ummm ..
(3x^2 + 4g) × (9x^4 - 12xg +16g^2)
is that right ?
OpenStudy (anonymous):
herroooo
hero (hero):
Yes, that's right
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hero (hero):
What were your steps?
OpenStudy (anonymous):
27x^6 = (3x^2)^3 and, 64g = (4g)^3
so i have ..
(3x^2)^3 + (4g)^3 = (3x^2 + 4g) × (9x^4 - 12x^2g +16g^2)