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Mathematics 13 Online
OpenStudy (anonymous):

Evaluate

OpenStudy (anonymous):

\[\sqrt{7x}\left( \sqrt{x} -7\sqrt{7}\right)\]

OpenStudy (anonymous):

Show work

OpenStudy (anonymous):

@mathmate

OpenStudy (anonymous):

@Astrophysics please help me, im dying lol this is my last question and im done with this one

OpenStudy (astrophysics):

Distribute the \[\sqrt{7x}\] \[\sqrt{7x} \times \sqrt{x}-\sqrt{7x} \times 7\sqrt{7}\]

OpenStudy (astrophysics):

\[\sqrt{7x} \times \sqrt{x} \implies \sqrt{7}\sqrt{x}\sqrt{x} \implies \sqrt{7}x\] can you do the other?

OpenStudy (astrophysics):

\[\sqrt{7x} \times 7\sqrt{7} \implies (1 \times 7)(\sqrt{7x}\sqrt{7}) \] you can simplify it more, I think you will be able to figure it out!

OpenStudy (anonymous):

\[\sqrt{7x}*7*7*\sqrt{7}\rightarrow \sqrt{7}\sqrt{7}\sqrt{7}?\]

OpenStudy (anonymous):

oh you already did it lol so what i did was obviously wrong haha

OpenStudy (astrophysics):

\[( 1 \times 7)(\sqrt{7x} \times \sqrt{7}) = 7\sqrt{x (7\times 7)} \implies 7\sqrt{49}\sqrt{x} \implies 7 \times 7 \sqrt{x}\] put it all together!

OpenStudy (anonymous):

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

OpenStudy (anonymous):

@Astrophysics

OpenStudy (anonymous):

Am i right?

OpenStudy (anonymous):

is my answer correct @mathmate ?

OpenStudy (mathmate):

If the question is correct, then the answer is not! :(

OpenStudy (astrophysics):

No, that's not right compare your answer with the first part

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