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 Dec 28 awarded Yearling Sep 30 awarded Explainer Dec 28 awarded Yearling Nov 25 comment find all integers x such that $4x^2 - 1$ is prime Good to hear! If you feel that the question has been answered, it is customary to mark it as 'answered'. Nov 21 revised find all integers x such that $4x^2 - 1$ is prime deleted 25 characters in body Nov 21 comment find all integers x such that $4x^2 - 1$ is prime Good catch, editing now Nov 21 revised find all integers x such that $4x^2 - 1$ is prime fixed typo in title Nov 21 answered find all integers x such that $4x^2 - 1$ is prime Nov 21 suggested approved edit on find all integers x such that $4x^2 - 1$ is prime Nov 21 comment For which $L^p$ is $\pi=3.2$? By calculate, do you mean analytically as opposed to numerically? Nov 18 answered Convert an inequality into limiting equality. Jan 31 comment How do I solve this (multiplication of exponents) look up order of operations and product rule in your book. Jan 31 answered The no. of $4$ Digit no. that contain the Digit $6$ exactly once , si Jan 31 comment Jordan form and its elements I caught Calvin's suggested edit. Jan 31 revised Jordan form and its elements small minor little details, one important thing Jan 31 suggested approved edit on Jordan form and its elements Jan 23 answered Is the expression “$\frac{a-b}{a-c}$ + $\frac{b-c}{b-a}$ + $\frac{c-a}{c-b}$” equal to 0. Jan 22 answered How is length a set function? Jan 22 answered The function $f:\mathbb R^+ \rightarrow \mathbb R$ defined by $f(x)=e^{x^2/2}\int_{0}^{x}e^{-t^2/2}dt$ is Jan 22 awarded Commentator