Parentheses Insert October 30, 2016 at 6:47amAugust 18, 2019 by huggins.5@osu.edu Insert parentheses to make the following equation true: 2 · 1 + 2 · 3 – 2 · 2 – 1 = 12 Show/Hide Solution 2(1 + 2 · 3) – 2(2 – 1) = 12