Question

\(\left(1-2x\right)^4=81\)

Answer 1

( 1 - 2x )⁴ = 81

=> ( 1 - 2x )⁴ = 3⁴

=> 1 - 2x = 3

=> 2x = -2

=> x = -1

Answer 2

(1-2x)^4=81

=>(1-2x)^4=3^4

=>1-2x=3

=>2x=1-3

=>2x=-2

=>x=-1

vậy x=-1

Answer 3

(1-2x)⁴=81

<=>1-2x=3

<=>2x=-2

<=>x=-1

Answer 4

(1-2x)⁴ = 81

(1-2x)⁴ = 3⁴

=> 1 - 2x = 3

           2x= -2

            x = -1

     Vậy x = -1

Answer 5

\(\left(1-2x\right)^4=81\)

<=>\(1-2x=3\)

<=>\(-2x=81-1\)

<=>\(x=\frac{80}{-2}=-40\)

Vậy x=-40