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Mathematics 11 Online
OpenStudy (anonymous):

Help check and with answers

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):

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

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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