Question

1. (2-√7)(2+√7)+(√7+1)²-√28

Answer 1

Объяснение:

держи бро будет просто 5

Answer 2

Let's simplify the expression step by step:

1. (2 - √7)(2 + √7): This is the difference of squares, which can be simplified as follows: (2 - √7)(2 + √7) = 2² - (√7)² = 4 - 7 = -3

2. (√7 + 1)²: This is simply the square of the binomial: (√7 + 1)² = (√7)² + 2(√7)(1) + 1² = 7 + 2√7 + 1 = 8 + 2√7

3. √28: √28 can be simplified by factoring out the largest perfect square, which is 4: √28 = √(4 * 7) = √4 * √7 = 2√7

Now, let's put it all together:

-3 + (8 + 2√7) - 2√7

Now, combine like terms:

-3 + 8 = 5

So, the simplified expression is 5.