Question

Find the sum and the difference of the following expressions: a+b and a–b

Answer 1

Answer:

Step-by-step explanation:

(a+b)+(a-b)=a+b+a-b=a+a+b-b=2a+b-b=2a

Answer: 2a

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(a+b)-(a-b)=a+b-a+b=a-a+b+b=2b

Answer: 2b