HỰA HỰA GỬI LỘN -))

1. 1 of 3

   ⬚⬚placeholder raised to the placeholder power⬚⬚	⬚⬚the placeholder root of placeholder end-root⬚⬚√	<is less than<	(	)		AC
   ⬚⬚the fraction with numerator placeholder and denominator placeholder end-fraction⬚⬚	|⬚|the absolute value of placeholder end-absolute-value|⬚|	≤is less than or equal to≤	7	8	9	÷
   log⬚log base placeholder oflog⬚	⬚!placeholder exclamation mark⬚!	>is greater than>	4	5	6	×
   ii𝑖	%%%	≥is greater than or equal to≥	1	2	3	−
   xx𝑥	yy𝑦	=equals=	0	.		+

2. 2 of 3

   sinsinesin	coscosinecos	tantangenttan	(	)		AC
   csccosecantcsc	secsecantsec	cotcotangentcot	7	8	9	÷
   arcsinarc sinearcsin	arccosarc cosinearccos	arctanarc tangentarctan	4	5	6	×
   ⬚2placeholder squared⬚2	⬚°placeholder degrees⬚°	πpi𝜋	1	2	3	−
   xx𝑥	yy𝑦	=equals=	0	.		+

3. 3 of 3

   dd⬚the fraction with numerator d and denominator d placeholder end-fraction𝑑𝑑⬚	∞infinity∞	⬚⬚the placeholder root of placeholder end-root⬚⬚√	(	)		AC
   lim⬚→⬚limit over placeholder right arrow placeholder oflim⬚→⬚	lim⬚→⬚+limit over placeholder right arrow placeholder raised to the positive power oflim⬚→⬚+	lim⬚→⬚−limit over placeholder right arrow placeholder raised to the negative power oflim⬚→⬚−	7	8	9	÷
   log⬚log base placeholder oflog⬚	C(n,k)cap C open paren n comma k close paren𝐶(𝑛,𝑘)	P(n,k)cap P open paren n comma k close paren𝑃(𝑛,𝑘)	4	5	6	×
   ∑sum of	∫⬚integral of placeholder⬚	∫⬚⬚⬚integral from placeholder to placeholder of placeholder⬚⬚⬚	1	2	3	−
   xx𝑥	yy𝑦	ee𝑒	0	.		+

\(\frac{3}{28}\)

nghe bài trình chưa? "cứ lên mạng phán xét tưởng là mình oai lắm"😎😂

(x – 1)(x + 1)(x + 2)

=\(\left(x^2+x-x-1\right)\left(x+2\right)\)

= \(\left(x^2-1\right)\left(x^2+2\right)\)

=\(x^2\left(x+2\right)-1\left(x+2\right)\)

=\(x^3+2x^2-x-2\)