add 2 square root 21 + 3 square root 21
To add the two terms, 2√21 and 3√21, we add the coefficients in front of the square roots:
2√21 + 3√21 = (2 + 3)√21
= 5√21
So, 2√21 + 3√21 is equal to 5√21.
To add 2√21 and 3√21, you can simply combine the terms with the same radical.
2√21 + 3√21 = (2 + 3)√21
So, the simplified answer is 5√21.
To simplify the expression "2√21 + 3√21", we can first combine the terms that have the same radical (√21). Here's how you can do it step by step:
Step 1: Identify the terms with the same radical (√21). In this case, we have 2√21 and 3√21.
Step 2: Add the coefficients of the terms, keeping the radical the same. The coefficients are 2 and 3, so 2√21 + 3√21 is equal to (2 + 3)√21.
Step 3: Compute the addition of the coefficients. 2 + 3 equals 5. Therefore, the simplified expression is 5√21.
So, the answer to the expression 2√21 + 3√21 is 5√21.