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Mathematics
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OpenStudy (anonymous):
Help check and with answers
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OpenStudy (anonymous):
OpenStudy (anonymous):
first one is right
in the second one A and D are true since \(\sqrt{8}=\sqrt{4\times 2}=\sqrt4\sqrt2=2\sqrt2\) and D true for the same reason
OpenStudy (anonymous):
thank you @satellite73
OpenStudy (anonymous):
yw
OpenStudy (anonymous):
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OpenStudy (anonymous):
may you help me with those
OpenStudy (anonymous):
lol method or answers?
OpenStudy (anonymous):
method
OpenStudy (anonymous):
look for a perfect square in the radicand (the number inside the radical)
or if you don't see one factor the radicand in to a product of primes
OpenStudy (anonymous):
the first one is the hardest
\[1008=16\times 9\times 7\] which is not so obvious
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OpenStudy (anonymous):
so
\[\sqrt{1008}=\sqrt{16}\sqrt{9}\sqrt{7}=4\times 3\times \sqrt7=12\sqrt7\]
OpenStudy (anonymous):
second on is much easier since it should be pretty clear that \(32=16\times 2\) and so
\[\sqrt{32}=4\sqrt2\]
OpenStudy (igreen):
@satellite73 Why are you helping him on test questions?! I thought that's against Open Study Rules..
OpenStudy (anonymous):
well im a girl 1st off and 2nd these are pretest questions like homework not going to affect my grade
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