(x2 - 29)3 = 343
(x2 - 29)3 = 73
x2 - 29 = 7
x2 = 7 + 29
x2 = 36
x2 = 62
x = 6
(x2 - 29)3 = 343
(x2 - 29)3 = 73
=> x2 - 29 = 7
=> x2 = 7 + 29
=> x2 = 36
=> x2 = 62
=> x = 6
(x2 - 29)3 = 343
<=>(x^2-29)^3=7^3
<=>\(x^2-29=7\)
=>x^2=29+7
x^2=36
<=>\(\orbr{\begin{cases}x=6\\x=-6\end{cases}}\)
(x2-29)3=73
x2-29=7
x2=29+7
x2=36
x2=62
x=6
Vậy x=6
Chúc bạn học tốt
Ta có: ( x2 - 29 )3 = 343
( x2 - 29 )3 = 73
x2 - 29 = 7
x2 = 7 + 29
x2 = 36
x = -6 ; 6
Vậy x = -6 ; x = 6
( x^2 - 29 )^3 = 343
=> ( x^2 - 29 )^3 = 7^3
=> x^2 - 29 = 7
=> x^2 = 7 + 29
=> x^2 = 36
=> x^2 = 6^2
=> x = 6