Question

Надо раскрыть скобки -(-20y-7,2x)

Answer 1

20у+7,2х
Вот так все просто

Answer 2

20y+7,2x  - так как перед скобкой минус, меняем знаки в скобке.

Answer 3

To simplify the expression by expanding the brackets, you can use the distributive property, which states that:

a * (b + c) = a * b + a * c

So, for the given expression -(-20y - 7.2x), we need to distribute the negative sign outside the bracket. When you distribute a negative sign, it changes the signs of all the terms inside the bracket. Thus, the expression becomes:

-1 * (-20y - 7.2x) = -1 * (-20y) - 1 * (-7.2x)

Now, simplify each term:

-1 * (-20y) = 20y -1 * (-7.2x) = 7.2x

So, the fully simplified expression after expanding the brackets is:

20y + 7.2x