Question 1011859
{{{-a+b}}} and {{{b-a}}} are equivalent expressions.


Start with {{{-a+b}}}. Use the commutative property to swap the terms "-a" and "b" to get {{{b+(-a)}}}. When you add on a negative, you're really subtracting. So {{{b+(-a)}}} turns into {{{b-a}}}. All of this shows how {{{-a+b}}} and {{{b-a}}} are equivalent.