1.

Find the sum of a + b and a - b​

Answer»

\rm{(a + b) + (a - b) = a + b + a - b}

\longrightarrow\rm{(a + b) + (a - b) = a + a + b - b}

\longrightarrow\rm{(a + b) + (a - b) = a + a = 2a}



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