bạn ko bấm máy tính đc à

=7^3.(1+7^2).5^4.(1+5^2).(3^4-3^4)

=7^3.(1+7^2).5^4.(1+5^2).0

=0

\((7^3+7^5)\times(5^4+5^6)\times(3^3\times3-9^2)\)

\(=(7^3+7^5)\times(5^4+5^6)\times0\)

\(=0\)

(7³ + 7⁵).(5⁴ + 5⁶).(3³.3 - 9²)

= (7³ + 7⁵).(5⁴ + 5⁶).(27.3 - 81) 

= (7³ + 7⁵).(5⁴ + 5⁶).(81 - 81)

= (7³ + 7⁵).(5⁴ + 5⁶).0

= 0

a, = 3.25 + 15.4 - 16 : 2 = 75 + 60 - 8 = 135 - 8 = 127

a: =75+60-8=127

a: =>9(2x+1)=6(3-x)

=>3(2x+1)=2(3-x)

=>6x+3=6-2x

=>8x=3

=>x=3/8

b: =>-3x^2-2+3x^2-18x=-26

=>-18x=-24

=>x=4/3

không sao mình còn không biết viết mũ nữa là

ưhats

\(4.4.8=2.2.2.2.2.2.2=2^7\)

\(64.16.8.4=4^3.4^2.8.4=\left(2^2\right)^3.\left(2^2\right)^2.2^3.2^2=2^6.2^4.2^3.2^2=2^{15}\)

1. \(2x=2^4\)

\(\Leftrightarrow x=2^4:2=2^3=8\)

2. \(3^x=81\)

\(3^x=9.9\)

\(3^x=3^2.3^2\)

\(3^x=3^4\Leftrightarrow x=4\)

3. \(2.2^x=64\Leftrightarrow2^x=32\)

\(2^x=8.4\Leftrightarrow2^x=2^3.2^2\Leftrightarrow2^x=2^5\Leftrightarrow x=5\)

4.\(3.3^{2x}=27\Leftrightarrow3^{2x}=27:3\)

 \(3^{2x}=9\Leftrightarrow3^{2x}=3^2\)

\(2x=2\Rightarrow x=\frac{2}{2}=1\)

5. \(x^2=81\Leftrightarrow x^2=9.9\)

\(\Leftrightarrow x^2=9^2\Rightarrow x=9\)

6. \(\left(2x\right)^2=64\Leftrightarrow4x^2=64\)

\(\Leftrightarrow x^2=16\Leftrightarrow x^2=4^2\Rightarrow x=4\)

7. \(2\left(x\right)^3=16\Leftrightarrow x^3=\frac{16}{2}=8\)

\(x^3=2^3\Rightarrow x=2\)

a, (-0,2)² \(\times\) 5 - \(\dfrac{2^{13}\times27^3}{4^6\times9^5}\)

= 0,04 \(\times\) 5 - \(\dfrac{2^{13}\times3^9}{2^{12}\times3^{10}}\)

= 0,2 - \(\dfrac{2}{3}\)

= \(\dfrac{2}{10}\) - \(\dfrac{2}{3}\)

=  - \(\dfrac{7}{15}\)

b, \(\dfrac{5^6+2^2.25^3+2^3.125^2}{26.5^6}\)

 = \(\dfrac{5^6+4.5^6+8.5^6}{26.5^6}\)

= \(\dfrac{5^6.\left(1+4+8\right)}{26.5^6}\)

= \(\dfrac{1}{2}\)

a, (-0,2)2 $\times$ 5 - 213×27346×9546×95213×273​

= 0,04 $\times$ 5 - 213×39212×310212×310213×39​

= 0,2 - 2332​

= 210102​ - 2332​

=  - 715157​

b, 56+22.253+23.125226.5626.5656+22.253+23.1252​

 = 56+4.56+8.5626.5626.5656+4.56+8.56​

= 56.(1+4+8)26.5626.5656.(1+4+8)​

= 1221​