Question

(√10,5+√10,5)^2-(√21)^2​

Answer 1

Надеюсь понятно написала..

Answer 2

Let's simplify the expression step by step:

1. Start with (√10.5 + √10.5)^2 - (√21)^2.

2. Simplify (√10.5 + √10.5)^2:

(√10.5 + √10.5)^2 = (2√10.5)^2 = 4 * 10.5 = 42.

3. Now, simplify (√21)^2:

(√21)^2 = 21.

4. Subtract the result of step 3 from the result of step 2:

42 - 21 = 21.

So, the simplified expression (√10.5 + √10.5)^2 - (√21)^2 is equal to 21.