The work shows finding the sum of the algebraic expressions β3a + 2b and 5a + (β7b). β β3a + 2b + 5a + (β7b)ββββββ Step 1:βββ3a +5a+ 2b + (β7b) Step 2:ββ(β3 + 5)a + [2 + (β7)]b Step 3:βββββ2a + (β5b) Which is used in each step to simplify the sum? Step 1: Step 2: Step 3: