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Mathematics 7 Online
OpenStudy (anonymous):

PLEASE HELP Multiply and simplify if possible.

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

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):

\[x \sqrt{7}\]

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

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):

\[\sqrt{7x} - 49x\]

OpenStudy (anonymous):

?

OpenStudy (anonymous):

no i just gave you the answer

OpenStudy (anonymous):

Okay thank you :)

OpenStudy (anonymous):

try this one. \[(\sqrt{\sqrt{2+\sqrt{3}}+\sqrt{2-\sqrt{3}}}+ \sqrt[4]{6})^{4}\]

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