Question

Обчисліть: (2√15-3)(2√15+3)=

Answer 1

(2√15-3)(2√15+3)=4*15-9=3*(20-3)=3*17=51

по формуле (а-в)*(а+в) а²-в²

Answer 2

Ответ:

решение смотри на фотографии

Объяснение:

Answer 3

To compute the expression (2√15 - 3)(2√15 + 3), we can use the difference of squares formula:

a^2 - b^2 = (a + b)(a - b)

In this case, a = 2√15 and b = 3. Let's proceed with the calculation:

(2√15 - 3)(2√15 + 3) = (2√15)^2 - 3^2 = (4 * 15) - 9 = 60 - 9 = 51

So, (2√15 - 3)(2√15 + 3) = 51.