ai giúp em với ạ, 4(x - 1) 3+2 mũ 2 = 5 mũ 2 . 2-14. em cần gấp ạ,cảm ơn anh chị

$4\left(x\:-\:1\right)\:3+2\:^2=\:5\:^2\cdot 2-14$

$⇒12\left(x-1\right)+2^2=5^2\cdot \:2-14$

$⇒12\left(x-1\right)+4=5^2\cdot \:2-14$

$⇒12\left(x-1\right)+4=50-14$

$⇒12\left(x-1\right)+4=36$

$⇒12\left(x-1\right)+4-4=36-4$

$⇒12\left(x-1\right)=32$

$⇒x-1=\dfrac{8}{3}$

$⇒x-1+1=\dfrac{8}{3}+1$

$⇒x=\dfrac{11}{3}$

`Vậy`  $x=\dfrac{11}{3}$

`4(x - 1)3 + 2^2 = 5^2 . 2 - 14`

`=> 4(x - 1)3 + 4 = 25 . 2 - 14`

`=> 4(x - 1)3 + 4 = 50 - 14`

`=> 4( x - 1)3 + 4 = 36`

`=> 4(x - 1)3 = 36 - 4`

`=> 4(x-1)3 = 32`

`=> 4(x -1) = 32 : 3`

`=> 4(x - 1) = 32/3`

`=> x - 1 = 32/3 : 4`

`=> x -1 = 8/3`

`=> x = 8/3 + 1`

`=> x = 11/3`

Vậy `x = 11/3`

`#dtkc`