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 Mar 3 revised Factor $16x^4-x^2y^2+y^4$ removed paranthesis in ttitle htat weren't necessary Mar 3 comment Factor $16x^4-x^2y^2+y^4$ He wants to factor the right side of the equation. Mar 3 reviewed Approve Factor $16x^4-x^2y^2+y^4$ Mar 3 comment Trivial solution when solving in integers another contradiction: $3|3t^2 \implies 3|(13s^2-24s) \implies 3^2|13s^2-24s \implies 3|t \implies 3|\gcd(s,t)$ Feb 29 reviewed Approve Find the integral of $\frac{\sin(x)}{1+\sin^2(x)}$ Feb 29 revised Integrate $\int_0^\infty \frac{\log x}{x^2+2x+4}\ dx$ edited title Feb 29 reviewed Approve More than basis vectors in a space are dependent, less can't span the space proof Feb 29 comment How do you sketch the LHS and RHS on one pair of axes and then solve @Galc127: so $|a|\ge |b|$ if $a=-1$ and $b=-5$ Feb 29 comment How do you sketch the LHS and RHS on one pair of axes and then solve How do you graph |x-1|? Feb 25 revised What is $x$ in a polynomial? typo Feb 23 comment What is $R\circ S$? For$s = \{(1,2),(1,3),(2,3),(2,4),(3,1)\}$ and … same quesion Feb 23 comment Prove a formula is not a logical consequence of KB @Wojowu: How do you write a comment with less than 15 characters? Feb 23 revised Tedious fraction decomposition integral error in formula Feb 20 comment Prove that $a^5 ≡ a$ (mod 15) for every integer $a$ It is sufficient to proof this for a=0,...,14 Feb 18 comment Eliminating a variable using three equations Did you already try to disprove it by choosing numbers that satisfy the first three equations and insert them in the fourth equation? Feb 18 revised $\frac{1\cdot2^2+2\cdot3^2+\cdots+n(n+1)^2}{1^2\cdot2+2^2\cdot3+\cdots+n^2(n+1)}=\frac{3n+5}{3n+1}$ by Mathematical Induction two numbers were missing Feb 17 revised $\frac{1\cdot2^2+2\cdot3^2+\cdots+n(n+1)^2}{1^2\cdot2+2^2\cdot3+\cdots+n^2(n+1)}=\frac{3n+5}{3n+1}$ by Mathematical Induction added 1 character in body Feb 17 revised $\frac{1\cdot2^2+2\cdot3^2+\cdots+n(n+1)^2}{1^2\cdot2+2^2\cdot3+\cdots+n^2(n+1)}=\frac{3n+5}{3n+1}$ by Mathematical Induction added 56 characters in body Feb 17 revised $\frac{1\cdot2^2+2\cdot3^2+\cdots+n(n+1)^2}{1^2\cdot2+2^2\cdot3+\cdots+n^2(n+1)}=\frac{3n+5}{3n+1}$ by Mathematical Induction added 20 characters in body Feb 17 answered $\frac{1\cdot2^2+2\cdot3^2+\cdots+n(n+1)^2}{1^2\cdot2+2^2\cdot3+\cdots+n^2(n+1)}=\frac{3n+5}{3n+1}$ by Mathematical Induction