Question

( 1 – 3x)³ = ( - 8)

Answer 1

\(\left(1-3x\right)^3=-8\\ \Rightarrow\left(1-3x\right)^3=\left(-2\right)^3\\ \Rightarrow1-3x=-2\\ \Rightarrow3x=3\\ \Rightarrow x=1\)

Answer 2

=>1-3x=-2

=>3x=3

hay x=1

Answer 3

\(\Leftrightarrow\left(1-3x\right)^3=\left(-2\right)^3\\ \Rightarrow1-3x=-2\\ \Rightarrow3x=1-\left(-2\right)=3\\ x=3:3=1\)

Answer 4

\(\left(1-3x\right)^3=\left(-8\right)\)

\(\Leftrightarrow\left(1-3x\right)^3=\left(-2\right)^3\)

\(\Leftrightarrow1-3x=-2\)

\(\Leftrightarrow-3x=-3\)

\(\Leftrightarrow x=1\)

Answer 5

\(\Rightarrow1-3x=-2\Leftrightarrow x=1\)