How do you simplify displaystylefracsqrt1sqrt7 imesfracsqrt7sqrt11 ?
displaystyle=fracsqrt1111 Explanation: displaystyleleft(fracsqrt1sqrt7 ight)cdotleft(fracsqrt7sqrt11 ight) We can observe thatdisplaystyleleft(sqrt7 ight. ...

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How do you solve displaystylefracsqrt12 imessqrt32+fracsqrt128sqrt2 ?
See a solution process below:Explanation:First, multiply the fraction on the right by the appropriate form ofdisplaystyle1to put both fractions over a common denominator: displaystylefracsqrt12 imessqrt32+left(fracsqrt128sqrt2 imesfracsqrt2sqrt2 ight)Rightarrow ...
You need 3X^2+3Y^2 instead of 6X^2+6Y^2 in the middle of your argument. It is 3X^2cos^2 heta+3X^2sin^2 heta, not 3X^2+3X^2
You must use the rule for triple vector product : a imes(b imes c)=b(acdot c)-c(acdot b)=bcosgamma - ccoseta, where gamma and eta are the angles formed by a with c and b. ...
https://math.stackexchange.com/questions/1127073/does-20-really-have-three-distinct-factorizations-in-mathcalo-mathbbq
The concept of norms is extremely useful here. Presumably you have read about it and maybe done some exercises pertaining to it. The relevant norm function here is: Nleft(fraca2 + fracb sqrt-312 ight) = fraca^24 + frac31b^24. ...

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https://physics.stackexchange.com/questions/27908/pseudo-superluminal-motion-and-the-synchronization-of-clocks
This is more or less correct, the intention is clear, but you are saying it in a little bit of a clumsy way. Your first statement is that if you have light crossing a certain distance, the distance ins ...
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left< eginarray l l 2 & 3 \ 5 & 4 endarray ight> left< eginarray l l l 2 & 0 & 3 \ -1 & 1 & 5 endarray ight>

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