Question

Add the following terms using horizontal method:
a + b, -a + b, a - b, -a- b​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

a+b,-a+b,a-b,-a-b

=a+(-a)+a+(-a)+b+b+(-b)+(-b)

=2a-2a+2b-2b

=0-0

=0