Question

(-x-7y)²-(x+7y)(7y-x)

Answer 1

Всё легко и просто♥️ держи

Answer 2

Let's simplify the expression (-x - 7y)² - (x + 7y)(7y - x) step by step:

1. First, let's expand the square of the binomial (-x - 7y)²: (-x - 7y)² = (-x - 7y) * (-x - 7y) = (-x)(-x) + (-x)(-7y) + (-7y)(-x) + (-7y)(-7y) = x² + 7xy + 7xy + 49y² = x² + 14xy + 49y²

2. Next, let's expand the product (x + 7y)(7y - x): (x + 7y)(7y - x) = x(7y) + x(-x) + 7y(7y) + 7y(-x) = 7xy - x² + 49y² - 7xy = -x² + 49y²

3. Now, substitute the above results back into the original expression: (-x - 7y)² - (x + 7y)(7y - x) = (x² + 14xy + 49y²) - (-x² + 49y²) = x² + 14xy + 49y² + x² - 49y² = 2x² + 14xy

Therefore, the simplified form of the expression (-x - 7y)² - (x + 7y)(7y - x) is 2x² + 14xy.