The given expression is "3√21 + 7√21".
When we combine the like terms, we get: (3 + 7)√21 = 10√21
So the simplified expression is "10√21".
add 3 square root 21 + 7 square root 21
10 square root 21
10 square root 42
square root 52
square root 24 + square root 28
1 answer