Which of the following expressions is equivalent to a+(– b)? Select all that apply. (– b ) + a b + (– a) (– a ) + b None of the above

Question

asked May 2, 2020 163k views

1 Answer

GenesisST · Answer 1 · 2020-05-07T23:59:07+0000

Answer: first option.

Explanation:

Given the expression:

a+(- b)

You need to remember the multiplication of signs:

$(+)(+)=+\\(-)(-)=+\\(-)(+)=-$

Then, you know that:

a+(- b)=a-b

So, an equivalent expression must have
and
. Let's check the expressions provided in the options:

$(- b ) + a=-b+a \\\\b + (-a)=b-a \\\\(-a ) + b=-a+b$

You can observe that the equativalent expression is:

(- b ) + a