`1, x^2 = 2^2`
`=> x = 2`
`2, x^2= (-2)^2`
`=> x = -2`
`3, x^3= 2^3`
`=> x = 3`
`4, x^3 =(-2)^3`
`=> x= -2`
`5, x^4 = 5^4`
`=> x= 5`
`6, x^4 = (-5)^4`
`=> x = -5`
`7, x^5 = (-3)^5`
`=> x = -3`
`8, x^5 = 3^5`
`=> x = 3`
`9, x^2 = 16`
`=> x^2 = (+-4)^2`
`=> x = +-4`
`10, x^4= 16`
`=> x^4 = (+-2)^4`
`=> x = +-2`
`11, x^2 + 1 = 10`
`=> x^2 = 10 - 1`
`=> x^2 = 9`
`=> x^2 = (+-3)^2`
`=> x=+-3`
`12, x^5 = 32`
`=> x^5 = 2^5`
`=>x=2`
Vậy: `x=2`
1) \(x^2=2^2\Leftrightarrow x=\pm2\)
2) \(x^2=\left(-2\right)^2\Leftrightarrow x=\pm2\)
3) \(x^3=2^3\Leftrightarrow x=2\)
4) \(x^3=\left(-2\right)^3\Leftrightarrow x=-2\)
5) \(x^4=5^4\Leftrightarrow x=\pm5\)
6) \(x^4=\left(-5\right)^4\Leftrightarrow x=\pm5\)
7) \(x^5=\left(-3\right)^5\Leftrightarrow x=-3\)
8) \(x^5=3^5\Leftrightarrow x=3\)
9) \(x^2=16\Leftrightarrow x^2=4^2\Leftrightarrow x=\pm4\)
10) \(x^4=16\Leftrightarrow x^4=2^4\Leftrightarrow x=\pm2\)
11) \(x^2+1=10\Leftrightarrow x^2=9\Leftrightarrow x^2=3^2\Leftrightarrow x=\pm3\)
12) \(x^5=32\Leftrightarrow x^5=2^5\Leftrightarrow x=2\)
13) \(\dfrac{x^3}{2}=4\Leftrightarrow x^3=8\Leftrightarrow x^3=2^3\Leftrightarrow x=2\)
14) \(\dfrac{x^3}{-3}=9\Leftrightarrow x^3=-27\Leftrightarrow x^3=\left(-3\right)^3\Leftrightarrow x=-3\)
15) \(x^5:x^3=\dfrac{1}{16}\Leftrightarrow x^2=\left(\dfrac{1}{4}\right)^2\Leftrightarrow x=\pm\dfrac{1}{4}\)
16) \(x^3=-64\Leftrightarrow x^3=\left(-4\right)^3\Leftrightarrow x=-4\)
17) \(x^{10}:x^7=\dfrac{1}{27}\Leftrightarrow x^3=\left(\dfrac{1}{3}\right)^3\Leftrightarrow x=\dfrac{1}{3}\)
18) \(\dfrac{99^2}{11^2}=x^2\Leftrightarrow x^2=\left(\dfrac{99}{11}\right)^2\Leftrightarrow x^2=9^2\Leftrightarrow x=\pm9\)
`13, (x^3)/2 = 4`
`=> x^3= 4*2`
`=>x^3=8`
`=>x=2`
`14. (x^3)/(-3) = 9`
`=> x^3 = 9 . (-3)`
`=> x^3 = -27`
`=> x = -3`
`15, x^5 : x^3 = 1/16`
`=> x^2 = (+-1/4)^2`
`=> x=+-1/4`
`16, x^3 = -64`
`=> x^3 = (-4)^3`
`=>x=-4`
`17. x^10 : x^7 = 1/27`
`=> x^3 = (1/3)^3`
`=> x=1/3`
`18, (99^2)/(11^2) = x^2`
`=> x^2 = 9^2`
`=> x^2 = 81`
`=> x^2 = (+-9)^2`
`=> x = +-9`
