=> \(4.x^3=47-15=32\)
=> \(x^3=32:4=8\)
<=> \(x^3=2^3\)
=> x = 2
\(4.x^3+15=47\)
\(4.x^3=47-15\)
\(4.x^3=32\)
\(x^3=32:4\)
\(x^3=8\)
\(x^3=2^3\)
\(=>x=2\)
\(4.x^3+15=47.\)
\(4.x^3=47-15.\)
\(4.x^3=32.\)
\(x^3=32:4.\)
\(x^3=8.\)
\(x^3=2^3.\)
Vậy \(\Rightarrow x=2.\)
`4.x^3 + 15 = 47`
`=> 4.x^3 = 47 - 15`
`=> 4.x^3 = 32`
`=> x^3 = 32 : 4`
`=> x^3 = 8`
`=> x^3 = 2^3`
`=> x=2`
\(4\cdot x^3+15=47\)
\(4\cdot x^3=47-15\)
\(4\cdot x^3=32\)
\(x^3=\dfrac{32}{4}\)
\(x^3=8\)
\(x^3=2^3\)
`=>x=2`
