how to simplify the sum of maths (a+b)+(a-b)-2ab
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simply open the brackets
(a+b )+(a-b) -2ab
a+b+a-b-2ab
2a-2ab
2a(1-b)
(a+b )+(a-b) -2ab
a+b+a-b-2ab
2a-2ab
2a(1-b)
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