Question

How can you prove that b - a is the negative of a - b?

Answer 1

add them

Answer 2

if two things are the negative of each other, then when you add them you get zero

Answer 3

right.

Answer 4

when u add them, u will get zero. this means that one is the negative of the other

Answer 5

\[(-1)\times(a-b)=-a+b=b-a\]

Answer 6

What @helder_edwin is more concise, actually.

Answer 7

Compare and contrast simplifying the numeric expression 3 – (2 + 5) to the algebraic expression 3x – (2x + 5).