-2×(-3+4)

Решение:

Given expression: -2 × (-3 + 4)

To solve this, we first simplify the expression within the parentheses: -2 × (-3 + 4) = -2 × 1

Now, multiply -2 by 1: -2 × 1 = -2

Therefore, the result of the expression -2 × (-3 + 4) is -2.

This simplification occurs because when we multiply a negative number by a positive number, the result is always negative. In this case, -2 multiplied by 1 gives us -2 as the final answer.