what property of multiplication is used in the equation below? why?

2 (3) 2

- (-)= -
7 3 7

I don't recognize an equation there.

Try to rewrite in on one line.

What do parentheses around a minus sign signify?

The property of multiplication used in the equation you mentioned is the commutative property.

The commutative property of multiplication states that the order of the numbers being multiplied does not affect the product. In other words, when you multiply two numbers, the result will be the same regardless of the order in which you multiply them.

In the given equation, 2 multiplied by 3 is equal to 6. The equation can be rewritten as 6 multiplied by 2, which gives us a product of 12. Therefore, the commutative property of multiplication ensures that the result remains the same, whether you multiply 2 by 3 first or 2 by 7 first.