Which expression is equivalent to 3(sqrt)343x^9y^12z^6?

A. 7x^3y^4z^2
B. 7x^3y^6z^2
C. 49x^3y^6z^2
D. 49x^3y^4z^2

Please help...

Respuesta :

mergl
A. would be the correct choice here

Answer:

[tex]7x^3y^4z^2[/tex]

Step-by-step explanation:

find the equivalent expression

[tex]\sqrt[3]{343x^9y^{12}z^6}[/tex]

we take cube root for each term

[tex]\sqrt[3]{343} =\sqrt[3]{7*7*7}=7[/tex]

[tex]\sqrt[3]{x^9} =\sqrt[3]{x^3*x^3*x^3}=x^3[/tex]

[tex]\sqrt[3]{y^{12}} =\sqrt[3]{y^3*y^3*y^3*y^3}=y^4[/tex]

[tex]\sqrt[3]{z^6} =\sqrt[3]{z^3*z^3}=z^2[/tex]

Now we combine all the terms

[tex]7x^3y^4z^2[/tex]