select the correct answer.\nwhich expression is equivalent to $21\\sqrt3{15} - 9\\sqrt3{15}$?\na. 12\nb…

select the correct answer.\nwhich expression is equivalent to $21\\sqrt3{15} - 9\\sqrt3{15}$?\na. 12\nb. $30\\sqrt3{15}$\nc. $12\\sqrt3{5}$\nd. $12\\sqrt3{15}$

select the correct answer.\nwhich expression is equivalent to $21\\sqrt3{15} - 9\\sqrt3{15}$?\na. 12\nb. $30\\sqrt3{15}$\nc. $12\\sqrt3{5}$\nd. $12\\sqrt3{15}$

Answer

Explanation:

Step1: Identify like terms

The terms (21\sqrt[3]{15}) and (9\sqrt[3]{15}) have the same radical part (\sqrt[3]{15}), so we can combine them.

Step2: Combine the coefficients

Subtract the coefficients: (21 - 9 = 12). So the expression simplifies to (12\sqrt[3]{15}).

Answer:

D. (12\sqrt[3]{15})