Question

81x²-(9x+7y)² Преаброзуйте в многочлен пожалуйста!

Answer 1

Ответ:

81х²-(9х+7у)²=(9х-9х-7у)(9х+9х+7у)=-7у(18х+7у)=-126ху-49у²

Объяснение:

Answer 2

Ответ:

це точна відповідь

(ручаюся за цю програму )

Answer 3

Converting the Expression to a Polynomial

To convert the given expression 81x² - (9x + 7y)² into a polynomial, we can start by expanding the expression and simplifying it.

First, let's expand the expression (9x + 7y)²: - The square of a binomial expression (a + b)² can be expanded using the formula (a + b)² = a² + 2ab + b².

So, the expansion of (9x + 7y)² is: 81x² + 2 * 9x * 7y + 49y²

Simplifying this, we get: 81x² + 18xy + 49y²

Now, we can substitute this expansion back into the original expression: 81x² - (81x² + 18xy + 49y²)

Simplifying further, we get: 81x² - 81x² - 18xy - 49y²

Finally, combining like terms, the expression simplifies to: -18xy - 49y²

So, the given expression 81x² - (9x + 7y)² can be converted to the polynomial -18xy - 49y².