Mathematics
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OpenStudy (anonymous):
Reduce: (32 x^7 y^5 z^9 a^2)^(1/3)
I got: (4z^3 x^2 y)(a^2 xy)^(1/3) as my answer. Am I wrong?
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OpenStudy (anonymous):
\[\sqrt[3]{{32}x ^{7}y ^{5}z ^{9}a ^{2}}\]
OpenStudy (anonymous):
Thats a cubed root btw.
OpenStudy (anonymous):
\[4z ^{3}x ^{2}y \sqrt[3]{a ^{2}xy}\] is what i got for my answer
jhonyy9 (jhonyy9):
4 not can be because 4*4*4=64
jhonyy9 (jhonyy9):
cuberoot32 = 2cuberoot4
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jhonyy9 (jhonyy9):
x7 =xcuberootx4
OpenStudy (anonymous):
Ah yeah I see what I did wrong
jhonyy9 (jhonyy9):
y5=ycuberooty2
jhonyy9 (jhonyy9):
z9=z2cuberootz
jhonyy9 (jhonyy9):
a2 reamind inside in this form
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OpenStudy (anonymous):
but the cuberoot of z^9 is z^3 isnt it?
OpenStudy (anonymous):
z^3 x z^3 x z^3 = z^9
jhonyy9 (jhonyy9):
not is because this is cuberoot not squareroot
jhonyy9 (jhonyy9):
no what you have wr
jhonyy9 (jhonyy9):
e is x27
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jhonyy9 (jhonyy9):
sorry z27
jhonyy9 (jhonyy9):
right ?
OpenStudy (anonymous):
but when you multuply you add the exponents
OpenStudy (anonymous):
you dont multiply the exponents
jhonyy9 (jhonyy9):
when you have exponent of exponent you need multiply exponentes
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jhonyy9 (jhonyy9):
how cuberoot8 =2
jhonyy9 (jhonyy9):
is 2*2*2
jhonyy9 (jhonyy9):
so
OpenStudy (anonymous):
2 x 2 x 2 = 8 z x z x z x z x z x z x z x z x z = z^9
OpenStudy (anonymous):
2^3 = 8 (z^3)^3 = z^9
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jhonyy9 (jhonyy9):
yes but z9 =(z3)3 = z3*z3*z3 =z27
OpenStudy (anonymous):
No you dont multiply exponents, you add them
OpenStudy (anonymous):
you just said z^9 = z^27 in your statement lol
jhonyy9 (jhonyy9):
so but there is cuberootz9
jhonyy9 (jhonyy9):
z9=z3*z3*z3
cuberootz3=z so cuberootz9=z*z*z=z3
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OpenStudy (anonymous):
Yeah that's what I said
jhonyy9 (jhonyy9):
ok now is right ALL ?
OpenStudy (anonymous):
Yeah, just remember when you multiply, you add the exponents, and when you divide, you subtract the exponents.
jhonyy9 (jhonyy9):
can solve now your exercise ?
OpenStudy (anonymous):
Yeah I did, the problem with my original answer was the 4 on the outside. Should have been a 2 on the outside and left a 4 inside the squareroot
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jhonyy9 (jhonyy9):
cuberoot
OpenStudy (anonymous):
Yeah thats what I meant my bad
jhonyy9 (jhonyy9):
ok bye
OpenStudy (anonymous):
Thanks :)
jhonyy9 (jhonyy9):
my pleasure
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jhonyy9 (jhonyy9):
good luck