Bài 7:

\(\dfrac{9^{16}.8^{11}}{6^{33}}\) =  \(\dfrac{3^{32}.2^{33}}{3^{33}.2^{33}}\) = \(\dfrac{1}{3}\) 

        Bài 6:

\(\dfrac{9^5.9^7}{3^{22}}\) = \(\dfrac{3^{15}.3^{21}}{3^{22}}\) = \(\dfrac{3^{36}}{3^{22}}\)  = 3¹⁴

10 ngũ 3 là sao em?

          Bài 1:

A = 8.(3² + 1)(3⁴ + 1)(3⁸ + 1)(3¹⁶ + 1)

A = (3^{2 -} 1)(3² + 1)(3⁴+ 1)(3⁸ +1)(3¹⁶ + 1)

A = (3⁴ - 1)(3⁴ + 1)(3⁸+ 1)(3¹⁶ + 1)

A = (3⁸ - 1)(3⁸ + 1)(3¹⁶ + 1)

A = (3¹⁶ - 1)(3¹⁶ +1)

 A = (3¹⁶)² - 1²  

A = 3³² - 1

i; (\(\dfrac{2}{3}x^2\) - \(\dfrac{y}{2}\))(\(\dfrac{2}{3}\)\(x^2\) + \(\dfrac{y}{2}\))

= (\(\dfrac{2}{3}x^2\))² - \(\left(\dfrac{y}{2}\right)\)²

= \(\dfrac{4}{9}x^4\)- \(\dfrac{y^2}{4}\)

g; (2\(x\) + \(\dfrac{3}{5}\))(\(\dfrac{3}{5}\) - 2\(x\))

= (\(\dfrac{3}{5}\) )² - (2\(x\))²

= \(\dfrac{9}{25}\) - 4\(x^2\)

h; (\(\dfrac{1}{2}\)\(x\) - \(\dfrac{4}{3}\))(\(\dfrac{4}{3}\) + \(\dfrac{1}{2}\)\(x\))

= (\(\dfrac{1}{2}\)\(x\))² - (\(\dfrac{4}{3}\))2

=  \(\dfrac{x^2}{4}\) - \(\dfrac{16}{9}\)

d; (\(\dfrac{x}{y}\) - \(\dfrac{2}{3}\) (\(\dfrac{x}{y}\)+\(\dfrac{2}{3}\))

= (\(\dfrac{x}{y}\))² - (\(\dfrac{2}{3}\))²

= \(\dfrac{x^2}{y^2}\) - \(\dfrac{4}{9}\)

e; (2\(x\) - \(\dfrac{2}{3}\))(\(\dfrac{2}{3}\) + 2\(x\))

= (2\(x\))² - (\(\dfrac{2}{3}\))²

= 4\(x^2\) - \(\dfrac{4}{9}\)

a; (\(\dfrac{1}{x}\) - 5)(\(\dfrac{1}{x}\) + 5)

= (\(\dfrac{1}{x}\))^2 -  5²

=  \(\dfrac{1}{x^2}\) - 25

b; (\(\dfrac{x}{3}\) - \(\dfrac{y}{4}\))(\(\dfrac{x}{3}\) + \(\dfrac{y}{4}\))

 = \(\left(\dfrac{x}{3}\right)^2\) - \(\left(\dfrac{y}{4}\right)^2\)

  =  \(\dfrac{x^2}{9}\) - \(\dfrac{y^2}{16}\)

Em muốn hỏi mini game của hệ thống nào em nhỉ?

     2,07 + (-7,63) - (-8,79) + 1,03 - 7,64

=  (2,07 + 1,03 + 8,79) - (7,63 + 7,64) 

= (3,1 + 8,79) - 15,27

= 11,89 - 15,27

= - 3,38