To combine the terms \( 3\sqrt{21} + 7\sqrt{21} \), you can add their coefficients since they are like terms.
\[ 3\sqrt{21} + 7\sqrt{21} = (3 + 7)\sqrt{21} = 10\sqrt{21} \]
So, the final result is:
\[ 10\sqrt{21} \]
3√21 + 7√21
1 answer
1 answer
To combine the terms \( 3\sqrt{21} + 7\sqrt{21} \), you can add their coefficients since they are like terms.
\[ 3\sqrt{21} + 7\sqrt{21} = (3 + 7)\sqrt{21} = 10\sqrt{21} \]
So, the final result is:
\[ 10\sqrt{21} \]