Question

4x³ + 15= 47

Answer 1

4x³ + 15 = 47 

4x³ = 47 - 15 

4x³ = 32

x³ = 32 : 4 

x³ = 8 

=> x = 2 

( vì 2³ = 8 )

k tui tui thề sẽ k lại ( gửi tin nhắn nha tui k cho )

Answer 2

4x³+15=47

4x³=47-15

4x³=32

x³=32:4

x³=8

=>x=2

Answer 3

4x³ + 15= 47 

\(\Rightarrow4x^3=47-15\)

\(4x^3=32\)

\(^{x^3}=8\Rightarrow x=2\)

Vì \(^{2^3}=8\)

Answer 4

4x³+15-=47

=> 4x³ = 47 - 15

4x³ = 32

x³ = 32 : 4

x³ = 8

=> x = 2

k nha!!!!!!!!!!!!!!!!!!!!!!!

Answer 5

\(4x^3+15=47\)

\(\Leftrightarrow4x^3=47-15=32\)

\(\Leftrightarrow x^3=\frac{32}{4}=8\)

\(\Leftrightarrow x^3=\left(\pm2\right)^3\)

\(\Leftrightarrow x=\pm2\)

            VẬY \(x\in\left\{2;-2\right\}\)

Answer 6

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