25² - 15²

= (25 - 15)(25 + 15)

= 10 . 40

= 400

205² - 95²

= (205 - 95)(205 + 95)

= 110 . 300

= 33 000

36² - 14²

= (36 - 14)(36 + 14)

= 22 . 50

= 1 100

950² - 850²

= (950 - 850)(950 + 850)

= 100 . 1 800

= 180 000

a)\(25^2-15^2=\left(25-15\right)\left(25+15\right)=10.40=400\)

b)\(205^2-95^2=\left(205-95\right)\left(205+95\right)=110.300=33000\)

c)\(36^2-14^2=\left(36-14\right)\left(36+14\right)=22.50=1100\)

d)\(950^2-850^2=\left(950-850\right)\left(950+850\right)=100.1800=180000\)

Xong rồi đấy,chúc bạn học tốt

a) 3 ^ 6 : 3 ^ 2 + 2 ^ 3 + 2 ^ 2 

 = 3^{6 - 2}  + 2^{3 + 2} 

  = 3⁴ + 2⁵  = 81 + 32 

  = 113 .

b) ( 2100 - 63 ) : 21

 = 2037 : 21

 = 97 .

c) 32 x 59 + 41 x 32

 = 32 x ( 59 + 41 )

 = 32 x 100

 = 3200 .

d) 99 - 97 + 95 - 93 + 91 - 89 + ... + 7 - 5 + 3 - 1 ( 50 so = 25 hieu )

= 2 + 2 + 2 + ... + 2 + 2 = 2 x 25 

= 50 .

a)   \(3^6:3^2+2^3.2^2=3^4+2^5=113\)

b)   \(\left(2100-63\right):21=2037:21=97\)

c)    \(32.59+41.32=32.\left(59+41\right)=32.100=3200\)

d)   \(99-97+95-93+........+9-7+5-3+1=2+2+...+2+1=25.2+1=50+1=51\)

giải giúp mik bài này nha

12x-33=3^2.3^3

\(205^2-95^2=\left(205-95\right)\left(205+95\right)=110.300=33000\)

Không bít xin lỗi nhiều

20565-9562=        11003

97² - 3² = (97 +3)(97 - 3)=100.94=9400

giúp mình nhé ^^

\(1,24^2-2,48.0,24+0,24=\frac{739}{625}\)

\(1,24x^2-2,48.0,24+0,24\)

\(\Leftrightarrow1,24x^2-2.2,48.0,24+0,24^2\)

\(\Leftrightarrow1,24x^2-1,2+0,1\)

\(1,24^2-2,48\times0,24+0,24^2\)

\(=1,24-2\times1,24\times0,24+0,24^2\)

\(=\left(1,24-0,24\right)^2\)

\(=1\)

\(41^2+82.59+59^2\)

= \(41^2+2.41.59+59^2\)

= \(\left(41+59\right)^2\)

= \(100^2=10000\)

=41²+.2.41.59+59²

=(41+59)²

=100²

=10000