a) 2 . x^3 - 2 = 52
=> 2 . x^3 = 52 + 2
=> 2 . x^3 = 54
=> x^3 = 54 :2
=> x^3 = 27
=> x =3
b) 2016 - 3 . ( x - 6 ) = 1446
\(\text{a)}2.x^3-2=52\)
\(\Rightarrow2.x^3=52+2\)
\(\Rightarrow2.x^3=54\)
\(\Rightarrow x=3\)
\(\text{b)2016-3.(x-6)=1446}\)
\(\Rightarrow3.x-6=2016-1446\)
\(\Rightarrow3.x-6=570\)
\(\Rightarrow x-6=570:3\)
\(\Rightarrow x-6=190\)
\(\Rightarrow x=190+6\)
\(\Rightarrow x=196\)
Vậy x= 196
a) 2.x^3-2=52
2.x^3 =52+2
2.x^3 =54
x^3 =54:2
x^3 =27
X^3 =3^3
=> x =3
b)2016-3.(x-6)=1446
3.(x-6)=2016-1446
3.(x-6)=570
x-6=570:3
x-6=190
x=190+6
x=196
