To add \(3\sqrt{21} + 7\sqrt{21}\), you combine the coefficients:
\[ 3\sqrt{21} + 7\sqrt{21} = (3 + 7)\sqrt{21} = 10\sqrt{21} \]
So the correct response is:
10√21
Add 3√21 + 7√21
.(1 point)
Responses
10√21
√24 + √28
√52
10√42
1 answer
.(1 point)
Responses
10√21
√24 + √28
√52
10√42
1 answer
To add \(3\sqrt{21} + 7\sqrt{21}\), you combine the coefficients:
\[ 3\sqrt{21} + 7\sqrt{21} = (3 + 7)\sqrt{21} = 10\sqrt{21} \]
So the correct response is:
10√21