Question

Simplify the following expression: (5 + √7)(5 - √7)

Option 1: 2
Option 2: 7
Option 3: 23
Option 4: 25

Answer 1

The simplified expression is 18.

Step-by-step explanation:

To simplify the expression (5 + √7)(5 - √7), we can use the formula (a + b)(a - b) = a^2 - b^2. Applying this formula, we have (5 + √7)(5 - √7) = 5^2 - (√7)^2. Simplifying further, we get 25 - 7 = 18. Therefore, the simplified expression is 18.

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