Add ab - bc, bc - ca, ca - ab . A. 0
Added by Lidia S.
Step 1
ab - bc = ab - ab + ac = ac bc - ca = bc - bc + ba = ba ca - ab = ca - ca + cb = cb Now, adding all three expressions together, we get: ac + ba + cb But notice that ac + ba = ab + ac = a(b+c), so we can rewrite the expression as: a(b+c) + cb And since cb = Show more…
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