Im having difficulty understanding something simple: Can someone show me how it is possible to get from 2aČ = dČ to d = a√2 many thanks
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Originally Posted by planetdomi Im having difficulty understanding something simple: Can someone show me how it is possible to get from 2aČ = dČ to d = a√2 many thanks Well first of all, that answer is wrong, but anyway... $\displaystyle \displaystyle \begin{align*} d^2 &= 2a^2 \\ \sqrt{d^2} &= \sqrt{2a^2} \\ |d| &= \sqrt{2}\sqrt{a^2} \\ |d| &= \sqrt{2}\,|a|\textrm{ or, if you like} \\ d &= \pm \sqrt{2}\,a \end{align*}$
wow Thankyou so much
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