Πάρτη Κοηλί

3,242 reputation

11036

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Hi, I am not really a per— oh wait. I am this 13 year old guy who relaxes all the time — not sure if has a real purpose in life.

I like to study mathematics and physics and will do some work on these interesting fields in the future. Currently targeting physics.

	3,242 reputation	bio	website		visits	member for	11 months
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Apr 14	comment	Factoring a long expression in the form $(a+b)^3 + (c - b)^3 - (c+b)^3$ Nice alternative. Thanks.
Apr 14	comment	Factoring a long expression in the form $(a+b)^3 + (c - b)^3 - (c+b)^3$ @Easy wow, that is epic! Gotcha!
Apr 14	comment	Factoring a long expression in the form $(a+b)^3 + (c - b)^3 - (c+b)^3$ $= -(b+a)(3c^2 - 3bc + b^2 + ac - ba + 2ac + a^2)$
Apr 14	comment	Factoring a long expression in the form $(a+b)^3 + (c - b)^3 - (c+b)^3$ @Jay Ah, I didn't notice that.
Apr 14	revised	Factoring a long expression in the form $(a+b)^3 + (c - b)^3 - (c+b)^3$ deleted 1 characters in body; edited title
Apr 14	comment	Factoring a long expression in the form $(a+b)^3 + (c - b)^3 - (c+b)^3$ $(c - b)^3 - (a + b)^3 = \left(c - a - 2b\right)\left(c^2 - 2cb + ac - ba + bc + a^2 + 2ab + b^2 \right)$ Is that correct?
Apr 14	asked	Factoring a long expression in the form $(a+b)^3 + (c - b)^3 - (c+b)^3$
Apr 13	accepted	$x = \sqrt[3]{3} + \frac{1}{\sqrt[3]{3}}$, what is $3x^3 - 9x$?
Apr 13	comment	$x = \sqrt[3]{3} + \frac{1}{\sqrt[3]{3}}$, what is $3x^3 - 9x$? Ah, so $3x^3 = 10 + 9x$ and I want to get the value of $3x^3 - 9x$, which gives me $10 + 9x - 9x = 10$. Great solution!
Apr 13	asked	$x = \sqrt[3]{3} + \frac{1}{\sqrt[3]{3}}$, what is $3x^3 - 9x$?
Apr 12	revised	The inverse function of $e^{x^2}$ added 198 characters in body
Apr 12	comment	The inverse function of $e^{x^2}$ Brian is right as always. I have a tendency to neglect things.
Apr 12	answered	The inverse function of $e^{x^2}$
Apr 12	comment	Mathematical Expressions; School Homework Err... do you know about the distributive property?
Apr 12	comment	Mathematical Expressions; School Homework No, I have shown you that it is $7$ step-by-step.
Apr 12	revised	Mathematical Expressions; School Homework added 16 characters in body; edited tags; edited title
Apr 12	answered	Mathematical Expressions; School Homework
Apr 12	answered	How can I prove that $xy\leq x^2+y^2$?
Apr 7	reviewed	Approve suggested edit on Is this sum equal to 1?
Apr 4	comment	Trigonometrical limit $\lim\limits_{ x\to 0 } \frac{\sin x - x\cos x}{x^3}?$ @DominicMichaelis Hmm, I think l'Hospital is much more fundamental, so I cannot expect myself to know that before l'Hospital...