Mathematics
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OpenStudy (anonymous):
simplify 5 sqrt v^8 - sqrt v^3 - sqrt 16v^8 + 3 sqrt v^3
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OpenStudy (cwrw238):
evalute like terms
eg - sqrt v^3 + 3 sqrt v^3 = ?
OpenStudy (cwrw238):
also sqrt 16v^8 = 4 sqrt v^8
OpenStudy (anonymous):
i thought you had to simplify first ?
OpenStudy (anonymous):
\[5\sqrt{v^{8}} - \sqrt{v^{3}} - 4\sqrt{v^{8}} + 3\sqrt{v^{3}}\]
OpenStudy (anonymous):
That becomes what cwrw was saying.
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OpenStudy (cwrw238):
thats what i'm doing
what is 5 sqrt v^8 - 4 sqrt v^8 ?
OpenStudy (anonymous):
1 sqrt v^8?
OpenStudy (anonymous):
1 sqrt v^8?
OpenStudy (cwrw238):
yep now work out whats in my first post
OpenStudy (cwrw238):
- sqrt v^3 + 3 sqrt v^3 =
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OpenStudy (anonymous):
2 sqrt v^3?
OpenStudy (cwrw238):
right now put them together and you have it
OpenStudy (cwrw238):
one term iv v^3 and one term in v^8
OpenStudy (cwrw238):
the answer is 2 sqrt v^3 + sqrt v^8
OpenStudy (anonymous):
thats not one of my options ): @cwrw238
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OpenStudy (cwrw238):
ok what are they?
OpenStudy (anonymous):
v^4+2v sqrt v, 9v^4 sqrt v^3, 9v^6 sqrt v, and 2v sqrt v^5 @cwrw238
OpenStudy (cwrw238):
ok - sorry I should have simplified further ( my bad decision0
v^8 = v^4 * v^4 so sqrt v^8 = v^4
OpenStudy (cwrw238):
2 sqrt v^3 = 2* sqrt v^2 * sqrt v = 2*v * sqrt v
answer is v^4 + 2v sqrt v
OpenStudy (anonymous):
thank you (:
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OpenStudy (cwrw238):
yw
OpenStudy (cwrw238):
sometimes we can be a bit too confident.....