Mathematics
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OpenStudy (anonymous):
PLEASE HELP
Multiply and simplify if possible.
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OpenStudy (anonymous):
whats the question?
OpenStudy (anonymous):
OpenStudy (anonymous):
\[\sqrt{7x}(\sqrt{x}-7\sqrt{7})\] now distribute
OpenStudy (anonymous):
\[\sqrt{7x^2}-7\sqrt{49x}\]
OpenStudy (anonymous):
now just simplify
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OpenStudy (anonymous):
ugh i dont exactly know how :(
OpenStudy (anonymous):
ok... \[\sqrt{7x^2}-7\sqrt{49x}\]
what is the sqrt root of x^2?
OpenStudy (anonymous):
2?
OpenStudy (anonymous):
no the square root of x^2 is x so you take out the x from the 7x
OpenStudy (anonymous):
\[x \sqrt{7}\]
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OpenStudy (anonymous):
because is a square root and their is no square root for 7 so you just leave the 7
OpenStudy (anonymous):
now what is the square root of 49?
OpenStudy (anonymous):
so \[x \sqrt{7}- x \sqrt{49}\]
OpenStudy (anonymous):
no
OpenStudy (anonymous):
square root of 49 is 7
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OpenStudy (anonymous):
\[x \sqrt{7}-7\sqrt{49x}\] since you have the square root of 7 you have to multiply it by -7
OpenStudy (anonymous):
so the answer is???
OpenStudy (anonymous):
\[x \sqrt{7}-49\sqrt{x}\]
OpenStudy (anonymous):
is there anything else that can be simplified?
OpenStudy (anonymous):
\[\sqrt{7x} - 49x\]
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OpenStudy (anonymous):
?
OpenStudy (anonymous):
no i just gave you the answer
OpenStudy (anonymous):
Okay thank you :)
OpenStudy (anonymous):
try this one.
\[(\sqrt{\sqrt{2+\sqrt{3}}+\sqrt{2-\sqrt{3}}}+ \sqrt[4]{6})^{4}\]