Question

(3а-b²)(3a+b²)+(3a-b²)(3a-b²)​

Answer 1

Ответ:

решение смотри на фотографии

Answer 2

To simplify the expression (3a - b²)(3a + b²) + (3a - b²)(3a - b²), we can expand and combine like terms.

Let's start by expanding the first term (3a - b²)(3a + b²):

(3a - b²)(3a + b²) = 3a * 3a + 3a * b² - b² * 3a - b² * b²

Simplifying this expression, we get:

= 9a² + 3ab² - 3ab² - b^4 = 9a² - b^4

Now let's expand the second term (3a - b²)(3a - b²):

(3a - b²)(3a - b²) = 3a * 3a - 3a * b² - b² * 3a + b² * b²

Simplifying this expression, we get:

= 9a² - 3ab² - 3ab² + b^4 = 9a² - 6ab² + b^4

Finally, let's combine both terms:

(3a - b²)(3a + b²) + (3a - b²)(3a - b²) = (9a² - b^4) + (9a² - 6ab² + b^4) = 9a² - b^4 + 9a² - 6ab² + b^4 = 18a² - 6ab²

So, the simplified expression is 18a² - 6ab².